It always struck me as a little odd that blessed potions of attribute gain increases attributed across the board:

1) I always thought of attribute potions as being of a substance that enhanced the drinker in one or more area. A potion that enhances all aspects of a person feels intrinsically dull.

2) The function of guaranteed attribute increases is already fulfilled by 'Potion of Increase X'. Randomizing potions in their blessed state would bring them conceptually in line with the potion's cursed and uncursed states.

3) There is no risk involved. Being able to increase attributes across the board guarantees a minor increase in ALL useful areas. Much better imho to have a lesser increase (e.g. 3-5+ from a blessed potion) in a randomized pair of stats.

4) This will have the additional effect of making characters remain more distinctive, as they are more liable to retain areas of serious weakness, where the PoGA in it's original form mitigates this somewhat by raising all attributes closer to 'normal' levels.

5) Blessed potions are overpowered relative to uncursed potions. Blessed potions are so many multiples more powerful than uncursed potions that drinking them in their uncursed state is essentially a huge waste. As a result a canny player will always wait until they can get holy water and bless their collected PoGA potions all at once. Then they'll subsequently drink them and go up ~2-4+ on all attributes. This essentially makes them less 'Potions of Gain Attributes' and more 'Potions of Become More Powerful in the Mid-Game'.

6) In line with decreasing the power of PoGA it might be worthwhile to upgrade uncursed potions to potentially be more useful, so that players will be more willing to quaff them early on (whilst running the risk that the potion might be cursed) rather than always waiting until later. This might be achieved by having them raise attributes by 1-3+ rather than always by 1+.