some have the connecting flights they are unable to use any more
Whatever about your other points, this one isn't FR's problem. They don't offer "connecting" flights, and don't try and sell them as such.
...or "connecting" easyjet/BA flights, trains, whatever. Everybody knows FR are not offering the connecting flights, but for the pax it's sometimes the best option to use such solutions. When the passenger does not allocate sufficient time for plane changes - it's his/her fault. If the flight is cancelled due to weather conditions or alike - it's his own risk and bad luck, nobody to blame. If the carrier changes/reduces flights already sold, it's a good reason to get furious.
Btw. The official FR's connecting flights could be a good solution to improve the LF's and profitability on some routes (I'm not the first one to notice this). It wouldn't be a big "FR's problem", it could be a win-win for them and pax as well.