Anzogh won’t be the reason most people summon in April, but with Ariel & Poseidon in Atlantis (plus the returning HotM) at the end of this month and Teltoc happening too, there will be a LOT of summons done and plenty of Anzoghs joining teams.
As stated here (as an opinion), Anzogh can help most players improve their bench (maybe not most players posting here on the forum, but most players in the game). Tough to make a strong case for him on the main defense team since he is most effective with help from defense down allies before he fires and in red those are all also average mana too, so if he is tank, he fires first 99% of the time. On offense he could prove much more effective when timing is under player control.
Would Anzhogh be my #1 choice of all the Red 5* in the game, no. Would I be pleased to joined my team while I am pursuing Guardian Jackal, yes, absolutely.
(edited terrible grammar)