I do think Brutal Stikes "you can forgo Advantage on the next attack roll" needs rewarded.
As written, if an ally gives you advantage, you still lose it to push.
Something like "you forgo advantage from Reckless Attack" would be much better.
I think I would go the opposite.
Decouple it from Reckless attack, then if you have advantage, you can give it up from your first attack for the Brutal Strike. This way you don't have to suffer the penalty of Reckless, if an ally is giving you advantage due to something or other.