The issue is that Albert was the one behind Alice's marriage. In fact, the only reason it went ahead IOTL (rather than Alice joining her younger sisters marrying nobodies to stay in Britain) was that the marriage was arranged by Albert so Victoria felt obliged to let it happen.Yeah, I figured as much. Since it involves Albert living longer, I'm just giving in and keeping Vicky's marriage the same, as well as Bertie and Alexandra. Not sure about Alice though - might ship her to the Netherlands and avoid the whole Alix of Hesse fiasco
Alix of Hesse is easy enough to avoid. Given the butterflies from Albert's death, it's possible Alix is never conceived. Even if we go with Alice having the same children as IOTL, you could easily have Alix die of Diptheria instead of/with her little sister Marie.