Should I handle Tweens on the client? - Help and Feedback / Scripting Support - DevForum | Roblox
It’s not advised against but it helps in situations like this.
Other than that, you’ll have to do more work to make memory for the tweens to use. This means reducing your part count or enabling content streaming, if it isn’t on already.
You could also make a settings option to change door styles etc to instant movement, but again you’ll need to handle them client side.