True, football has evolved but there are very few players like Modric. It's easy to say the last 5 CL winners but 4 of them have been Real, the other Barcelona. who have exceptional squads in every position (plus Ronaldo and Messi). Modric is magnificent, but he also has Casemiro (not particularly strong attacker) and Kroos (certainly not a player about speed, energy and power) next to him. Iniesta and Rakitic also had Busquets.
Regardless, Bentancur has plenty of energy, speed, technique, height and fits the profile of a modern footballer. He just is lacking from an attacking point of view. Not every midfielder these days needs to be attacking. I could see him taking Busquets type role very well, where he has technique to keep the ball and win back possession.
Who knows he might develop going forward, he is still young. But people need to change their expectations about him being a Pogba, they are very different.