Custom Season/Custom tournaments

I know you can customize a franchise mode, but is it possible to create a custom season where you choose number of teams, games, divisions etc. I feel this used to be in previous games. I would like to create a custom season using chl/ohl alumni teams. ex Lindross tavares on Oshawa, Perry, Kane on the London knights. It doesnt seem possible. You can't add overage players to chl teams, and can't substitute chl teams in custom franchise mode.

Also custom tournaments would be nice, or atleast add the option to substitute teams in world tournament, or it would be cool to use nhl teams in the spengler cup. Also bring back memorial cup option, again I feel that was an option in previous games. I feel these are easy fixes that would allow a lot more enjoyment to offline games/ seasons.