What is one thing you wish rct3 did differently?

So with all the craziness going on in the world right now, I've been dedicating a lot of time into the recently released, rct3 complete edition since it's been 8 years ago for me that I used to play the game religiously. I know I'm a newcomer to these forums but I would like to ask both former and new rct3 players, what is one thing you wished the game did differently? For me, I wish the game could handle higher poly counts so larger objects wouldn't lag the game heavily or disappear easily.

(Also, I know planet coaster has been officially called the "spiritual successor" to rct3, I just wanted to hear people's thoughts on what rct3 could have done differently within the context of the rct franchise)

I also apologize if this question might have been asked before, I'm just genuinely curious on what you guys think the game could have done better on.

Oh my. Where to begin? I don't think I can state just "one thing", but: 64 bit architecture, so the game could make use of gazillions of gigabytes of RAM. Utilization of multi-core systems. Better use of user-installed graphics processors (cards). All of those things would pretty much eliminate Lag. Better looking shadows. Basically, Planet Coaster's use of light, shadow, and texture. I don't much like the artistic style of the peeps in both RCT3 and PC. No raining inside of buildings. Interiors of buildings should be nighttime DARK  even during the day. The ability to make the cars on coaster trains different colors, like in RCT2. The way that time passes; calendar days last mere seconds while physical days last ~10 minutes real-time. Also, there are no Winter months. There are literally hundreds more, but I've used up most of shyguy's ink on this reply already. So I'll let others chime in for those.

I'd like an 'undo' button and winter weather would be nice.

I'd like for it to tolerate big parks that utilize custom scenery. Maybe more water-park features like a drop slide, or an actual wave pool.

I wish the game had more theme variety. In rct2 triple thrill pack, you got a ton of variety on the various themes you could pick from. I also wish the game came with more themed rides. 

It would've been nice if we had different water effects to change so it could create a different look to our park maps/environments such as lava or green water.