Use Honeywell VisionPro without EIM?
No, you can't
Unfortunately, the Honeywell thermostats that use an EIM rely on it to translate either RedLink (for wireless versions) or a proprietary protocol (for the wired ones) to the 24VAC signals that a furnace understands.  So, since Honeywell discontinued the wired versions in favor of their RedLink counterparts, you'll need to hunt down a secondhand EIM for your thermostat.