I don't know how viable VM was before but it is now completely obsolete with the 2/14 patch, given that "Engineering Team will now completely cleanse all effects caused by Viral Matrix." So an ensign level ability that just about everyone uses now completely trumps a LtCmr. ability, also because engineering team has a 30 sec cool down and viral matrix has a cool down of 90 sec, it will virtually never be a threat at any point, and a teammate will almost always be available to help in the rare cases where ET isn't available.
I'm thinking engineering team should just instantly counter all science abilities.
I hardly ever run eng team, tbh, even on my cruisers. It interferes in my tac team cycles, and all. Prefer combinations involving aux2sif and epts in my eng slots. Slotting eng team tended to reduce my survivability across the board, as I always just got blasted when tac team was on cooldown.
If you're going to be slamming somebody with VM and they'll use eng team to clear it up, they're still vulnerable for the next 15 seconds *shrug*
Pro tip: Roll Tactical officer/escort which never get's nerfed. Photonic shockwave/tractor beam repulsors/Feedback pulse do too much damage because of Go down fighting/AP:A? Nerf the science abilities! It's not like we need to nerf tactical abilities!?