Like @rwashdc said I would expect parks to look at ways to draw people to come visit. I expect SEAS at least to continue on their path of capital investment and bring new rides and attractions to their parks in the coming years. That strategy did appear to be working before the pandemic. I think money will be tight at theme parks but that these places know that headlining attractions attract people and will be looking to do that.So I'm more thinking parks are going to continue with anything already (mostly) paid for and/or constructed (Pantheon, Drachen Spire, the KD 4D FreeSpin) but are going to lay low for awhile on any more major purchases.
Their bottom lines are hurting compared to normal years, and my assumption based on the anecdotal evidence presented around this forum is that there's pent up demand tempered with caution meaning many parks may be better off penny pinching until the pandemic is over and large-scale consumer confidence and spending go back up.
As far as whether that means we see more clones that's an interesting question. I think it will depend on the chain. Places like Six Flags don't have as much of an issue with clones as other chains. I do think that you will see manufacturers pushing custom coasters more than clones because they make more money from them. I do think it's likely that you see companies be even more willing to push the envelope because that's what parks will be interested in. Could lead to an interesting few years.
Of course all this is prefaced by the fact that this is all unprecedented and we have no idea what it will be like post-Covid. I wouldn't expect it to be like a normal recession where it takes years to recover. I expect we will see a recovery happen pretty quick. And there will be a lot of people who just can't wait to go back to theme parks and similar activities.