Hmmm...
Speaking as a career medic, I kinda see the point of downgrading the alternate weapons. Think about it:
1. The alternate medic weapons, as they are now, are fairly adequate at killing and defending oneself. I've certainly killed my fair share of flanking scouts and unaware pyros with them.
2. A buff to the old weapons would then either make the medic better at killing, or add yet another alternate medic ability they have to think up, animate, etc.
3. A more combat ready medic WOULD make the medic popular, but that would also make players more prone to use him in a "Combat Medic" style, a style Valve probably wants to discourage, similar to their choices with the Sniper unlocks.
As far as the Beta nerfs are, I prefer the -25% damage Blut, and I actually like the -20 health saw more than the other one. I only pull the Saw out when someone ambushes me or I can ambush someone else. Either way, that person NEEDS to DIE. A 25% damage reduction would make using the Ubersaw a suicide mission, because at that kind of range, almost anyone you're attacking can kill you back in a second or two. The loss of health means you only take it out on lone enemies or emergencies, but thats a good trade off for something as important as 25% uber.