Joystick controls really have their benefits as you said… for start (on phones) you really see more on the screen as your fingers are not in the middle clicking. Secondly you don’t misclick and that’s not that hard on a phone. Thirdly your hands will feel a lot better after long gaming sessions, especially with the current big screens where if you hold the phone it’s not that easy for your thumbs to reach the middle of the screen. This leads to 4th, phones are too/long nowdays and you will have hard time to reach fast mid of the screen and it will lead to hand pains if you play for long period of times.
We are just used to and VG was on top of that created with touch controls in mind… but also the idea for only 3vs3 (less to tap on and pay attention to) and times where big big phones where 4.7/5 inch and 16:9…
There is a reason why most if not currently all of the top players are playing on ipad pro (not only it’s big big, but also 120Hz and believe me when I say that this DO lead to advantage in intense fights with a lot going on) or atleast other ipad… it’s just a lot easier to play on when used. Ofc if after how many years… 4-5? playing on a phone, I will have hard time to adapt to a tablet and need a few weeks as it’s totally different experience, but when I get there I will perform better and have better ingame awareness (as I will see more and easier).
Saying all that, that version of LOL will be mobile centred and even if I was to decide what to go with, I would choose joystick controls with maybe considering touch ones as addition. It’s the logical decision based on many factors (few of them listed above).