Is the need to move the players and opponents around to specific map locations too difficult for this type of game to work in this format?

If it has been done how? or how would you do it?

Use a decent photo editor. Design or find tokens for the PCs and NPCs. Snag a grid map from your image search of choice. Drop the tokens on the map and move them around as necessary. There is a map feature here, but I’ve found uploading maps to imgur and providing a link works better.

You’ll likely want to run combats as simultaneous affairs instead of post in initiative order. Everyone posts their round 1 actions. You resolve them in a batch, resolve your NPC actions, update the map, then move on to round 2. It’s worked for me.