You also need to think about this: MMO's are usually 50 - 70% carebear and 30% PvP. You need high end PVE content on Alpha for these people.
Perhaps high level missions should be on Alpha just without top level tokens or a reduced payout for both. I'd hate for Alpha to be nerfed down to the kind of PVE content you can do with a t1 mech. It needs to be challenging even for groups on Alpha AND Beta.
I remember back in Beta, the biggest corp in the game Ecorp did nothing but take on new people and help them enjoy the game. They did this from Alpha only. Their Beta attempts were few and far between. It absolutely should be the case that Alpha can support end game gameplay, just with significantly less reward and significantly less risk.
Proverbs 23:20-21 warns us, “Do not join those who drink too much wine or gorge themselves on meat, for drunkards and gluttons become poor, and drowsiness clothes them in rags."