
I run a lot of Pathfinder Adventure Paths in VTTs, because it's a good source of full color art and maps.
Some of the maps in these books are usable as VERY large canvases, of 200 units or more. I've already put together a few of these in Roll20, and the service holds up admirably — it loads faster than MapTool for sure.
The trouble is, you can kind of tell that Roll20's interface wasn't designed for this kind of play. There are two main issues:
**Zoom** — The zoom tool maxes out on 10% which isn't quite enough to fit a 200 unit map on a VERY big screen. Using Alt and the scroll wheel is a great option, but it doesn't stay concurrent with the zoom tool on the toolbar... you zoom out, but the toolbar still says 100% and you have no idea what your actual level of zoom is. Also, placing text notes at varying levels of zoom in varying font sizes is very strange and inconsistent.
I'd love to see the two methods made concurrent, and maybe have a temporary % display when you are changing zoom.
**Finding tokens** — Let's say I want to run a sandboxy campaign in a giant city map. In maptool, my penchant has been to place a TON of tokens all over the map, so that I can ad lib player interactions with them. On very large maps, this has proven to be a chore in Roll20. Initial placement of the object on a large map will drop the token /somewhere/, but not beneath the cursor, and I have to go hunting for it. And then, once I have it on the map, there's no good way to track it down from amongst the 50-odd tokens I may want to populate my city map with.
If Command/Ctrl + F just brought up a "Find" field, and you could type a token name in there with text completion, or if you could review a list of tokens on a given map, that would make my games much easier to manage.