As some who has played maybe 30-50% of DOS1+2 and currently the first of three acts in BG3: If you have issues with the gameplay mechanics in DOS1/2 you’ll likely have them in BG3 too. Main difference is a vastly improved storyline, which kinda makes up for most of them.
Issues I still have with BG3 boils down to only the active character can use its abilities in conversations and sometimes (mechanically) unexpected stuff happens that can only be undone by saves.
If your issue with DOS was a boring story and lack of hidden/funny things to uncover you should give BG3 a try, if you disliked the overall experience you likely won’t enjoy BG3.
You can use a git client to connect to SVN repo, which is really neat if you have to deal with a SVN repo. Therefore I would assume git has no issues with migrating the history from SVN.