I am not against all changes. As an example, I think the Ranger tweaks are OK but need more work.
I am definitely in the "try using the 5e rules as written first and if they don't work, then break out the house rules." camp. Yes, 5e has issues and is not perfect but as is, it's been playtested alot.
Why spend money on a system ( It's not like Hasbro is letting LS use D&D for free ) and then not use it 100%