The let Alençon marry Suzanne was a my proposal and I always said to let Montpensier living as condition for that match... If both Louis of Montpensier and Duke Peter die as OTL (or before Suzanne is already married off) no way who Suzanne marry anyone than the brother of her first fiancé.
We were talking about a match between Henry, still Duke of York and Marguerite as the Spanish matches (Katherine first and Eleanor after Isabella’s death) are better for the Prince of Wales... or a longer living Henry VII who will consent to have Henry VIII marrying Eleanor...
About Marguerite and Louis of Montpensier my point was who he was a bad match for the sister of the probable future King of France as Marguerite sure would be a lot attractive for him but Anne of Beaujeu and Louis XII would be strongly against that match and the Duke of York a much more interesting prospective.
I actually think we agree on most of the above:
The issue for me, and I think you would agree, is that the Anjouleme marriage for the Duke of York only works if it is actually going to happen before Arthur's death but given Henry was only ten when Arthur dies it is unlikely (given both were well under the legal age). If Arthur lives another three or four years then it might be doable but there is a chance that Katherine and Arthur have a child which reduces Henry's attractiveness internationally and France might not be as keen on the match to a second son.
For me with the exception of Louise of Savoy's offer the French didn't seem particularly keen during this period on an Anglo-French marriage and Louis XII clearly though Henry VII didn't need any added incentives to maintain a peaceful relationship.
For a match to happen I do think you need a completely different set of political circumstances that would force one side or the other into a match.