This shouldn’t be a problem, havn’t tried it yet, the only issue is you’ll have to manage each nft separately, with a separate launcher ID for each plotnft, or alternatively replot to consolidate.
The only thing that shouldn’t be allowed is one plotnft on multiple pools, because that would be cheating. But seeing as each plotnft can only be assigned to one pool at a time, it isn’t an issue. Similarly each plot can only be assigned to one plotnft, I assume for the same reason, one plot can’t belong to multiple pools.
There is, an OG plot will have a pool public key, nft plots wont. However, as far as I can tell there is no way to differentiate one plot belonging to one plotnft, from another plot from a different plotnft, and no way of telling which plot belongs to which nft.