Cheaper grens isnt gonna give you more mapcontrol late game since all the suppresion and indirect fire that is on field at that point is gonna nuke them to stoneage. It's all about mapcontrol and Tiger was the only thing that gave that.
New Brummboi is actually quite good. And the mp reduction on reinforce costs actually helps quite a bit.
I think the 28mp reinforce for Grens should have stayed instead of being moved back to T4, Gren starts are pathetically weak at the moment and have been for a looooong time.