Even if we'll buy 3 new RBs, Roberto won't play too much as a midfielder.
He is a good guy, he can always step in to be a sub and rest key players on lots of positions, but that's more or less it.
If Gomes and Denis won't improve, we'll just buy 5 new Cms eventually.
I want to say: Roberto is a good player for a lots of positions, but he hasn't got world class quality for any of positions (Jack of all trades, but master of none).
Some will reply: if we gave him more chances and continuity...
Well, imo, nothing would happen. Imo, he naturally has way lower ceiling than Gomes, Denis, Alena and majority of our midfielders.
So, about posts how our midfield would have looked different with Roberto in it, imo, it wouldn't. It would have been the same as with Denis and Gomes.
Except that there is still a chance that Gomes and Denis will reach their higher potential one day.
Roberto has more or less reached his ceiling.