I'm not sure where to start, but here goes.
1) Direct complaints regarding the CEP should be posted in a CEP thread, not here.
2) CEP scripts are optional to use. they also may or may not work properly with whatever other systems you employ and at times conflict with changes Bioware made in their final 1.69 update, especially as concerns horses.
3) If CTP doors are bugging, then its not a CEP issue, but rather you've not properly installed and used the CTP hacks in their proper order or failed to merge 2da files as needed. If by "bugged" you simply mean that when selecting these appearances in a CEP module you get a message saying the model is missing, thats not a bug. The doors.2da for CEP is preset to allow CTP doors to work, but you need to have installed the CTP itself before you get them.
4) As for killing creative opportunities, only each individual user can do that. If scripts don't meet your expectations, rewrite them. If certain creature or placeable appearances lack what newer options bring, replace them with your own overriding hak sets. If new tilesets like this one are craved, add them to your own hak sets as well. CC in the NWN Community is all about creativity. '>