I'm having trouble multitabling more than two tables at the moment because of problems with my internet connection, and I'm finding it a big disadvantage in table selection.

A large part of finding the right table is just luck. You can look for tables with high see flop % and big average pot size, but then you go on a waiting list. Most of the time there's no choice in your seat at the table, and you don't really know how good a table is until you've been sitting at it a while.

Sure I just leave if I find myself at a bad table or a bad seat, but if I'm playing at more tables, there is more chance of finding the good ones.