In Solasta (where the system as a whole was well-implemented) I think concentration works well and I like it just fine. Of course the system was made with tabletop in mind. Its a tabletop system. Rebalanced spells for a video game and you have to rebalanced everything else, at which point just make a whole new system. But plenty of people are coming because they want to play 5e. The system isn't perfect, but no system is. Its good and fun and would be doing its job if Larian hadn't mucked with it the way they already have. Suggesting wholesale changes like this kind of misses the spirit of adapting the system.
