You can find very positive reviews of Dorney on this Forum. One example is the recent discussion of their Haunt:
Post in thread 'Dorney Park Halloween Haunt'
Event - Dorney Park Halloween Haunt
Pretty belated reply to my last post but I will bite. This is going to be a long post.
The Haunt at Dorney does have excellent haunted houses, but their ride operations are lackluster. I was a SP holder there from 1992 to 2019. For over 20 years I had a great time at Dorney which I had considered to be the best of the local parks. Clean, low crowds, decent operations, pleasant clientele, charming atmosphere, etc. Starting around 2014 the quality of the park just began a sharp decline from previous years, and each new season things got worse. Ride operations slowed to a snail pace, upkeep took a slide, breakdowns became more frequent, cleanliness really took a nosedive, they removed stuff that made the park unique, it became more crowded, the clientele became increasingly scuzzy, secuity was scaled back,, and English being spoken was becoming rare. The last few times I was there my group were sometimes the only English speakers in some of the lines. Fights and line cutting became much more commonplace at Dorney. Ride SBNO closures became increasingly common too, especially with the Zephyr and Cannonball. They also became weird with roller coaster operations, running two trains on low crowd days and single trains on high crowd days. They also became very lax enforcing ride safety. I saw people not only have phones out during rides, but even throwing stuff like hard candy on Steel Force. Also seen people scoop up road bed gravel on Zephyr's track to throw at the geese along the stream.
The decline in Wildwater Kingdom was even worse than over in Dorney. They removed many of their unique slides and replaced them with generic duplicates of slides they had elsewhere in the park. There was an massive increase in trash buildup along the sides of the lazy Rivers as well lifeguards becoming evermore lax allowing guests to increasingly misbehave and roughhouse. Years ago they use to be strict against any roughhousing in the rivers, not anymore.
The bathrooms and changerooms were unkempt and became pigstys. Toilet paper all over bathroom floors, the hot water stopped working in the men's showers for years. My female friends said that the hot water occasionally worked in the women's showers, it was very hit or miss. Sadly on several occasions I saw defecations in change rooms and shower stalls which I never saw in prior years nor at other Waterparks to this day. Then they began banning aqua socks to protect your feet and using incorrect diameter inner tubes for their slides which caused them to become stuck and eject riders which happened to me. Slammed my head on a slide wall and had to go to first aid. Ended up having to leave early with my friend driving me home that trip. A similar incident happened to one of friends whose oversized tube became stuck and threw him in the shallow landing pool injuring his feet later the same season.
The last two years I did Haunt they gave SP holders a free one time express pass good for both the houses and rides which was nice. The express passes worked excellently for the houses as employees handled the merging really well. However, this was not the case with the rides. The fast pass line just merged in near the end of the standby queues with no employees to ensure a smooth merge by express pass holders. Instead, express pass holders basically had to cut themselves into the standby line and hope the standby people didn't start a fight. It was awkward merging into the standby line, and the standby people made it clear they weren't happy at me, at least a fight never started for me. I did see fights breakout other times with other fastpass holders and standby guests. Because of that I mainly used the fast passes for the houses as only those had employees to handle the line merging.
While the houses were good, the Haunt shows were pretty lacking, some of the fright zones were good, some were not. Some of my female friends complained that the ghouls in some of the the fright zones at Donery, mainly the zombie themed ones sometimes said inappropriate sexual remakes to them, I witnessed a couple of these incidents myself and we notified park security about it. They didn't want to go Haunt anymore after that with ghouls crossing the line to sexual harassment.
After a couple years of escalating issues at Dorney, I came to the reluctant conclusion I was no longer having fun at Dorney which used to be my go to park. It used to be a place you could reliable have a fun day, but ceased being that way the last few years I still visited. It was not an easy decision but one I stand by. Sorry for the wall of text detour but this is partly why I am not happy about the SF / CF merger besides the great elimination of competition. I fully expect roll eyes from certain members.