I think going for an aura effect to improve the synergy between two unit types will be a huge mistake:
- There are already many things in the game that punish non-blobbing
- We don't want to further add more incentives to reward blobbing
P.G.s are rather hard to blob since they are expensive they come late and takes ages to reinforce...Further more they would have to operate near a tank or vehicle to get any bonus...so i more like combined arms and not blobbing of one unit...
Moreover, designing an aura/ability that allows somebody to completely bypass the mechanics of cover will be a massive boost mindless a-move blobbing. Cover mechanics and bonuses are there to reward careful positioning.
Well they should be able to operate behind the cover of tanks (and they can) but that needs too much macro...so this is substitute...
There are plenty of abilities that provide defensive bonuses already in the game this is nothing new...
Finally, if you give such an aura to PGrens, what chance would anybody have of stopping a PGren blob buffed by a command P4 in open portions of the map (where you have little cover, and they get the aura; just like that, for free)?
that is an issue of not having a cap to bonus a unit can have and should be addressed separately.
When it comes to giving them repair or minesweeper abilities I don't think that PG should be turned into SP...