Personally I wish gimmick link skills were a bigger deal. I love the idea of themed deck building, but outside of specific dokkan events, there's no reason to. But it'd be cool if you got a huge bonus for running an otherwise weaker team, like an all-GT team, or an all-DB team, etc. But maybe this would run afoul of gacha laws too.
I still think they should've remade links to incorporate special abilities. i.e. all units linking from Ginyu Force have a chance of stunning, DB units linking reduce def, etc. An easy way to make 90% of units not trash.