Optimization does not mean that the game will yield high frames per second. If you look at what the game achieves, you could argue the game is quite well optimized, also for current hardware; the game is capable of utilizing multiple cores and multi-threading for instance. The TMTK does affect the loading times in a rather unpleasant way, making them a lot longer than they should be. The transitions between the scenery and building menus also seem to be affected by the TMTK. Note that this is likely a bug, which might or might not get fixed eventually.
Planet Coaster does miracles, that is right, but part of optimization is also designing the game for current HW. Honestly, would you say the same about the game using 3D graphics, while 3D accelerators weren´t on the market and the game wouldn´t run or if yes, it would run horribly, that it is well optimized for what the game is cappable of? Don´t think so.
Also, I would forgive it more if it at least was designed to really use current tech (such as native DX12 support). But no, it rly isn´t using all it can and while I can understand why, it doesn´t mean I´m allright with it.
Also, I don´t think we (or at least me) want the game to "yield high frames per second", however, it´s not acceptable that it´s not playable. And it becames unenjoyable very soon. And I can for instance delete all the scenery, close the park and get rid of guests, but it will not get better again as one might expect. That´s another hint that there is something wrong with optimization, otherwise it would improve again after I kick out guests and delete scenery pices...
