Can you please improve how your shop chooses its champions

title is tldr.

I made a post about how useless my your shop was this time around. It just really sucks to look forward to something all summer and then find out that it's completely useless. I made a pretty good argument about potentially letting people choose their your shop champions but even if thats not an option I really hope the way it chooses the champions at random could be improved.

Improvements could be:

1: it shouldn't look at the last 6 months, I'd say 3 months at most or less if more matches are played. Heck idk why it doesnt just look at the last X matches instead of time frame since that would be the same regardless of how much someone played during any time.

2: It shouldn't count solo custom matches or custom matches shorter than 20 minutes. It also shouldnt count aram or any other game mode where players can be forced to play a certain champion (one for all being the most recent example of this). It also shouldnt count practice tool but im assumimg that it currently doesnt count it already.

3: It shouldn't look at the roll and should instead look at the specific champion. For example, I main kayle and ended up getting garen and gangplank, both of whom i hate to play. Perhaps it could rank champions by change in mastery points to determine what champions a player has been playing instead.