I think you grossly overvalue the importance of having the perfect magic items on power level. One of my first 4e campaign was run with virtually no magic items (yes, at the other extreme from handing out lots of random items). I just integreted the expect bonuses to attack, defense and damage into level progression. There were very few magic items providing daily/properties, players were very happy when they got anything and they prized it. Encounters were still level +2 to level +4 (I loath easy fights) and the heroes still won.
It's really not a big deal in terms of power level if some of the non core items are purely random.
Well, if you see that way, you see it that way. I just gotta say that in 15 years I have NEVER seen a PC buy an item by 1/36th increments! It always came after one, two or three at the most big windfall.Let me turn that around a bit. What good is a +1 club in a group where someone needs a Staggering axe +2 to improve? IMO less good than 72gp. At least they got 1/36th closer to there goal.