was just googling what happened to the old mothership and found this topic :P
I found this also in the starcraft wiki:
"The mothership's use in multiplayer is curtailed by its high cost, position on the tech tree, vulnerability to focus firing, low mobility, and relatively low damage output." (http://starcraft.wikia.com/wiki/Mothership)
So... basically the mothership is a horrible unit. Low damage, Slow, can't soak damage, hard to get. Basically an ultralisk except more useless since ultras actually do damage.
Hence, they should definitely redo mothership. its supposed to be the ultimate unit, but instead the collossi is pretty much the toss' ace unit. mothership is not useless but is not always worth to get. if youre going coll, which most toss eventually go to, you need stargate and fleet beacon, which contributes nothing to your gateway robo army. espec since voids are useless against hydra/corr.
they should at least return the time bomb except just slow down the units and projectiles but not stop. Think an aoe slow is op? Look at the marauder. Make it basically just like a marauder slow except an area of effect shield.
I'm not saying they should bring back the old mothership completely, since that simply looked devastating and literally you just needed to have the mothership to win the game, but at least make it a viable unit. It already barely kills marines with its 36 attack (6 damage, 6 attacks) and its horrific 2.21 attack speed, which basically cancels out the 6 attacks. Mothership has 16.7 dps and Marines have 10.7 dps (According to liquipedia) So, basically two 50 mineral units out dps a mothership, adding to its uselessness.
Looking at the current abilities:
Cloak. Cloak is without a doubt a great aspect of the mothership. If unscouted it is deadly to.... zerg. Sometimes. The build time is 160 seconds, so that in itself is difficult NOT to scout. Terran have scans to easily counter and vikings to slaughter the mothership. Overseer takes 17 seconds to train. It takes 17 seconds for the mothership to basically accelerate to its max speed of a turtle. (Obvious exaggeration but you get the point).
Recall. Awesome. Yes, a great ability i will say, although proxy pylons basically do the same thing or warp prisms from that robo making coll...
Vortex. Good. Comparable to arbiter? Not really in my opinion. After getting off your arbiter's stasis field, move in, wipe out rest of army. With vortex... If you vortex their army your zealots are now useless, if they get close enough, boom they go in too.
Redo plox. (This reflects WoL not HoTS)