Slow issue fixed?

In a turn of events I never would have expected, I'm starting to migrate certain devices back to ST. This looks like a great candidate since echoes are, by definition, cloud-based anyway. I already have ES on ST, but HE uses the ES integration on HE. If I remove ES from HE, then adapt my HE rules to use the ST implementation of ES via HubConnect, does that work? Do I need HubConnect v2 (on v1.4 now)?