Kog'Maw post 6.19 W making Atk Spd slower?

I dunno if it was like this for anyone or just me or maybe just the skin i was using. I was playing Battlecast Kog'Maw after his 6.19 revert, overall i am mostly happy with the reverts, i used to play a fair bit of kog before the changes and stopped after the changes. Anyway, playing with his w active felt over all bad, it actually felt like having it on with was slowing how fast i was attacking, my kite ability and manoeuvrability (I think it's the animations being too slow affecting this). I had well over 2.0 Attack Speed ( and a maxed out Q), but when i activated W it felt very sluggish and much worse overall, i've played a LOT of high attack speed marksman's before and this just doesn't feel right. **Minor note, i'm not entirely sure on this one, after having died the few times in that match that i had W active, i'm pretty sure my attack speed was lower than when i was farming normally without W. (i look at my stats a lot)

Not sure if this is intended, which if it is, oh well. If not, i hope i've pointed out a bug that was making the gameplay of this Champion/skin for myself and maybe other people not all that great.