It really isn't that bad, especially for a funcom game. I've yet to have a real crash in 200 hours. Sometimes it will close but if you read the log it is a graceful shutdown. I've only had 2 of those closes.
The real problem for me is the mod scene. We get a sort-of source to their inner workings in blueprint form, but blueprints are so limited about all we can do is change the funcom blueprints. When you do that the mod breaks after a patch because your patch is using the old version of the blueprint or table or whatever.
When epic finally can be arsed to release the devkit a day or two later, to rebuild you have to completely nuke any changes to any funcom stuff you made, basically taking a screenshot before hand, then go back in and redo it all. Then recook it (30 minutes). It lasts for about a day then they patch again and here we go again.