As far as I know there is no force field method that exists that handles delocalization. I would say that if you need to work on specific interactions that occur from delocalization, then you need to use a more advanced QM package, something like ORCA.
There may come a time when Avogadro will have something like GFN2-XTB, which may be able to handle something like that with relative ease, but until then it won’t be accounted for here.