Removal of features is a slippery slope. If grenades are too powerful and easy to get, what about area of effect spells, best quality weapons, and so on? Taking this to a logical, but absurd, conclusion, just make every character have the same statistics and fight with fists only.
Grenades are a means of providing more options in the way players tackle battles. No player is forced to use them.
As we have not seen how Larian intend to implement Tactician mode (and possibly even higher difficulty modes?) I do not see any point in removing grenades at this stage of development.
More generally, I have now seen a number of different requests of the form:
I think this feature spoils the game.
Therefore I do not want it in my game.
Therefore no one should have it in their game.
If you want a harder game then simply eschew the relevant features. Don't collect grenades and the problem will solve itself. If you feel that Larian should design their games so that all levels have a much higher difficulty than at present then you should accept that the number of people buying the games in future will decline, so there will be less money for development leading to less polished games leading to fewer purchasers, a genuine vicious circle.
