Pepega comments about the support item changes
Pepega: OMG they took away 25% mana regen from Spellthief's line, poke supports are ruined
5Head: Hmm i now longer need need to spend 850 frostfang now i can buy
instead. Oh, turns out i get more build diversity and better stats all around. Oh i also get 7 extra gold per proc pre tier 2 and i also get 1 extra gold per 10.
Pegega: Muh HP/5 how will i ever sustain poke
5Head: Same thing but with 
Just stop with the supports are getting nerfed comments. Supports are getting 1500ish EXTRA free gold and better build diversity. Supports are literally being buff harder then any role in League history.
Won't be surprised if "funneling" comes back simple to abuse a second Support item.
that provide both cdr and dmg but cost more.
Not sure about tank but since targon line doesn't heal anymore i guess it will be hard to proc the buff without risking to get poked until death so overall they would take longer in order to get their hp/5 item.
Conclusion, yes they're nerfed and enchanter will be stronger.