I agree with most of what you have said Borg.
The main thing I think you have missed is the need to advertise the game. No point having it's own site or being on top of the current site if people don't know it's here. A tutorial for noobs is only useful if we are attracting noobs to the game
I don't think that the ranking system should
replace the seasonal managers table, but have them running alongside each other would be good. The managers table shows who have been the best teams in any given season and it could take years for new teams to place on the ranking system which could be very demoralising. Another section on the drop down menu on the managers tables of 'all time top teams' with Decas rankings.
I like the idea of changing the Inter Conference Cup to a Champions League/Europa League style tournament with a Super Cup at the end.
However I strongly disagree with scrapping the Elite Cup.
Also disagree with taking away training benefits from the official leagues, unless there is a cheaper way of training introduced.
Speaking of training, regardless of whether you are a member or not, i would like to be able to see how my team is developing on the training page. Which you can't do unless you are a member.
I also think the squad size of 20 is fine.