Kayn PBE Changes - Why not remove the timer mechanic?

So I was looking over the potential Kayn changes on the PBE and I do like the changes a lot. The Darkin Scythe (Passive) Power gained from damaging enemy champions tweaked from [old] to [new] Context - "We're currently testing a changelist that allows Kayn to collect passive points way more quickly before 10 minutes, slightly slower than on live after that."

Umbral Tresspass (R) : AD ratio increased from 150% to 165% Damage increased from 150/250/350 to 175/275/375

However, I still think the main change with his character that needs to be considered is the timer lockout for your choice of transformation. I don't understand why it even exist. It is way too heavily dependent on the opposing teams choices as far as team comp and also heavily influenced by who you can gank and when you can gank them. I do not mind filling up a meter prior to transformation but then gating the transformation you want feels like an additional headache to the champ. I know someone at Riot thought it would be a cool mechanic but it doesn't really do anything but hold this champion back. I think this aspect of the champion may need to be reviewed again if not entirely just removed and provide both transformation as an option after the meter is fully charged. It would be a great little quality of life buff and I've read many complaints from people who have played kayn say that they get the transformation they don't want/need more often than not based on the game. I know that this part of the post seems anecdotal but please Riot, take this into consideration. I love playing Kayn and do so often and really think this particular change could increase his usability without the need for additional buffs or adjustments.