It would be better to get rid of Infiltrate altogether for this:
It doesn’t dump as much Specialist/Elite aggro on teammates, it allows Vet to live the “shooter fantasy” while providing a reasonable trade-off to doing so by making the Vet more vulnerable to ranged counterfire. Vet temporarily gets upgraded weapon, gets improved visibility over hordes, gets to ignore melee.
Maybe not likely, but a good suggestion nonetheless worth mentioning.