I think okw is already way too similar to ostheer. Giving them pak40 like gun goes a long way into breaking uniqueness of factions even more. Honestly, I would definitely rather come back to shreck blobs with no snare than give okw another ostheer copy paste. There is no point in ballance if all that differs factions is their name.
You can always remake the raketenwerfer into something completely unique that actually complements the faction.
If you completely remove raketen from okw, you have a faction that has no chance toretaliate against early light vehicles. You also get a faction that, if at any point, manages to fall behind on tank trades gets overrun.
None of the above are covered adequately by the current raketen. Instead the unit is optimised for cheesy artillery unit kills, as well as mocing and retreating in blobs when critical mass has been reached. For everything else, it's unreliable, and 1 raketen is functionally equivalent to 0 raketens.
So, if the raketen is meant to be unique for a reason, I fail to see the reason have any relevance post-schreckblob removal.