The doule-trebuchet is also toned down from 6 shots to 4.
Pegasus knights are good, but they're about as vulnerable as your other Knights and can't be sacrificed (counting for break point). Combine that with their requirement to charge on initiative and they can be tricky to get the most from.
Counter to what I've interpreted some people's advice to be: There's a problem in sending the non-Knights in first to weaken the enemy. Although they don't count for break point, those units do count for victory points, and breaking the enemy isn't auto-win (it always comes down to VPs, but a broken enemy can only get a draw at best). If you send your regular men in unsupported and they all die, you can easily find yourself only having drawn games as you break your opponent but lose on VPs.
I'll just state again- this is all from reading Bretonnian tactics threads, never having seen them played.