If vacuum on pets would make sentinels obsolete, then they should make sentinels more interesting to compensate. Every pet and sentinel should be useful in certain scenarios. It should not boil down to whether it has vacuum or not, which I believe is what made them introduce universal vacuum in the first place.
Also, yes I can play without vacuum, bit I don't like it. Because the regular loot pickup range is like a meter or so and whenever I play without vacuum I keep looking on the minimap for pick ups and have to move around a lot more to actually find them, especially on more ve