Alpengeist:
1)Touch up the snow theming with new paint, maybe some dripping icicles during hot summer days to help cool off the guests.
2) somewhere in the queue, a radio playing the crazy jazzy alpengeist theme along with faux weather reports. I’ve put the link here :
Direct Link to Embedded Media Source
3) the final turn before the brake run become an enclosed cave with chilled fog. At the final brake, a large screen that appears to be ice shows the image of the alpengeist on the other side which roars at guests before hitting the ice which cracks but doesn’t break.
Apollos Chariot:
1)Swap the tent theme for a temple. In the large switch back area make a spot for a large statue of the god Apollo. Various stone carvings in the walls depict Apollo’s myths.
2) one of the statues has to be a goose.
3) in the station, a large ceiling painting depicting Apollo on his chariot and the sun with lighting effects to make the sun glow and shimmer.
4) replace the head chopper tents with temple ruins.
Pantheon:
1) replace the wooden fence walls with weathered stone walls. One before reaching the stairs a wall appears to be a painting but is a screen that comes to life showing the gods and how they will be featured in the ride.
2) the swing launch section should be enclosed in a tunnel with fog and lights to disorient riders.
3) a plaza added on the other side of the ride, allowing for a more scenic location.
Roman Rapids:
add more splash effects in the first half themed to Neptune and other reliefs. Perhaps a bacchus with a pitcher of wine with water coming out.
Escape From Pompeii:
1)add a screen element in the first half with the falling Timbers where you can see through a hole in the wall as Vesuvius begins to erupt.
2) rework the audio system so the statue falling noise and the action are synced up again.
3) before the final drop, have one of those soap suds snow blower machines making it “rain ash”
Verbolten:
1) put something under the first launch so you don’t just see the entry to the ride building just cut off to nothing underneath. Perhaps some faux rock work or greenery.
2) update the lighting package inside
3) new screens and effects for the swirling thingy and the drop section.
4) bring back the old queue video or at least make a new one to better set up that the Black Forest is dangerous.
5) water effects at the bottom of the main drop to splash out as if the cars hit the water.
Invadr:
1)add structures in the middle of the helixes. Maybe one be a crashed Viking ship and the other have a log cabin “burning”
2) add theming to the bridge you go under to better fit the theme.
Tempesto:
1)Rebrand it with new theming to better fit the Roman theming. Maybe name it zephyr or Venti after the wind gods.
2) new paint job the fit with the idea of wind and the sky.
Darkoaster:
1) add a few more props to the ride layout maybe some animatronics.
2) redo the whole clouds and lightning strikes with better technology.
Griffon:
1) add a audio aspect to the top of the hill with a hawk or eagles cry before dropping as if it’s the Griffon.
2) add talon marks through the roof of the load station.
3) the head chopper at the end should receive some shade either by adding fabric over the structure so it looks like the overhang of a building.
4) enclose the brake run with the sound of the griffon on the roof above with some minor effects like a gently shaking items maybe a chandelier with minor lighting effects. Maybe make it the smiths shop since there’s a blacksmiths forge in the extended queue.
I think that covers the majority of the attractions at the park.
I need to find a new hobby.
(I couldn't find the 
emoji)