It is entirely possible to do most things at EPCOT without G+, but we still use it.
I've found that we don't get many high value LL's at EPCOT, but it gives us the time to eat and stroll the festivals and World Showcase. Hardest to acquire are Test Track, Remy's Ratatouille Adventure, and Frozen Ever After. We usually rope drop one of those attractions and use LL for the others. If you do, I'd prioritize Cosmic Rewind virtual queue at 7am and then grab one of those other three that you aren't rope dropping.
As much as I love Soarin', I hate that queue, so I appreciate that when it has 45-60 minute waits. We often find ourselves later in the day getting LL's for rides like Living with the Land and Spaceship Earth that are only 15-20 minute waits, but it helps I suppose.