Let's talk about Lulu
Alright, for those of you who don't know what the Lulu changes were they are as follows
E - Help, Pix! ENEMY FOLLOW DURATION 6 seconds ⇒ 4 seconds REMOVEDMINION CAST Minions gain a shield BASE DAMAGE 80/130/180/230/280 ⇒ 80/110/140/170/200
She got said nerfs because she was becoming a bit of an instant pick mid.
Now... why did Lulu mid become a thing? Lulu is VERY difficult to kill if played right. Why is that important for mid? Two reasons, firstly mid has gotten taken over by assassins for the most part and mid is arguably the easiest to gank. The other reason is that Kayle pretty much fit the same niche as mid Lulu until her burst damage got nerfed.
Now whether Lulu is too powerful when played mid or not I don't know. I personally think she's simply an anti meta pick because she's countered by any mage that doesn't mind a farm fest and outscales her hard. Those mages however are generally bad against assassins and ganks which are common.
My opinion of the nerfs however is that she got hit in the completely wrong places. Let's look at where she got hit.
Enemy Follow Duration: Pix reveals enemies when he follows them (including stealth), so that nerf hurts Lulu's utility that semi counters in combat stealth. It also hurts Lulu's ability to use her glitterlance slow, because it used to be easy to Q-E-Q during a chase for 4 seconds worth of slow, now that is much much harder.
No longer can shield minions: Firstly Lulu was like the only person who could do that so goodbye some champion uniqueness. Secondly Lulu has very bad base AD and AS probably to encourage her to E teammates and give them her passive. What that means is support Lulu is very bad at pushing towers outside of shielding minions so they can tank more shots, and now that's gone.
Base Damage Reduction: Now granted this change doesn't hurt Lulu as much as the others because support Lulu will probably be mostly using this as a shield. However I would like to point out that Mid Lulu can use what AP scalings she has for more damage, Support Lulu not so much. That means a base damage nerf will take away a much larger percent of support Lulu's damage.
Here's the big kicker. When Annie was getting played a ton in support but almost never played mid what happened? The answer is she got power shifts and not nerfs. Lulu was in pretty much the same situation, played a ton mid but almost never support, but she got straight nerfs. Why?
Anyway those are my thoughts on Lulu's nerfs, please post your own. I'm also going to add a poll.