Is Trundle Really In Need Of A Triple Nerf?

http://www.newsoflegends.com/wp-content/uploads/2015/12/Trundle-Final-Portrait-1.jpg http://www.newsoflegends.com/wp-content/uploads/2015/12/Nerf-Box3.png http://www.newsoflegends.com/wp-content/uploads/2015/12/Pillar-of-Ice-Final-Icon-1-1.jpg Pillar of Ice [ E ]

Mana cost increased from 60 at all ranks to 75.

http://www.newsoflegends.com/wp-content/uploads/2015/12/Nerf-Box3.png http://www.newsoflegends.com/wp-content/uploads/2015/12/Subjugate-Final-Icon-1-1.jpg Subjugate [ R ]

Cooldown increased from 80/70/60 seconds to 110/90/70; Mana cost increased from 75 at all ranks to 100.

I mean these are pretty massive nerfs to his laning phase but Tahm Kench only got his movespeed while carrying an Ally removed and nothing has been done to Rengar still. Why not just increase Trundles ult time and not nerf his mana on two of his spells? You all triple nerfed WW too because he was too strong due to devourer and now I haven't seen a WW in 2 months and same goes for Sej and Cinderhulk