Did you try to play Wizardry 8 without any mods to speed up the game? Good luck, you will spend twice the amount of time to get the same experience - except going nuts during some combat turns as a bonus.Genuinely struggling to think of any game which I've played and enjoyed more with mods, other than Morrowind.
That said, wouldn't hurt to have a list of modded stuff either.
Did you play M&B Warband? Granted the base game was great in itself but some of the mods were really good too. And if you wanted a more historical or more fantasy experience then some total conversions offered better experience.
Did you play nuXCom? People shit on it too much on the Codex but truth to be told the game is only average... ok... whatever. Try Long War, makes it a very good one instead. Not a CRPG though.
Diablo 2 single player is crap. Well, Diablo 2 is shit in general but if you want single player to smell less, MedianXL - long time ago, don't know what happened to it later - was more fun to play than base game SP.
If you liked JA2 vanilla and want to replay it at some point then I guarantee you that you will like 1.13. Just take some older version of the mod before it got too bloated. Those are as good as vanilla but add some cool stuff on top of vanilla.
Then you have QoL mods. Many games have them. In some cases they are life saving - as in preventing you from cutting your wrists. W8 is a good exemple.
In other cases, your life might be safe but sanity (or eyesight) can still suffer without QoL mods.
Say, if you play Battle Brothers I suggest some time saving mods. Ones that pause the game automatically on encountering enemies and on arriving in towns. Otherwise if you want to avoid ambushes you have to travel at base speed x1 to be safe. Not my idea of fun. And one that makes news in taverns more readable by changing the color of letter for key words. Again, reading those might be fun.... the first 50 or 100 hours but if you play longer it becomes a chore. Only an "almost-CRPG" though.
Ok, some of those are not CRPGs but the point is, there are great mods out there that make games either better from get go or add a lot of replayability if you liked the vanilla game a lot.