I understand the annoyance: I too have long-term multi-entry tourism visa revoked under current policy.

Although the introduction of legislation to resurrect or re-install visas which might otherwise be valid would carry the level of complexity beloved by Indian civil servants, i can't see it happening. ditto compensation payments or the gratis issue of new visas.

I'd like to be surprised by the goodwill of the MHA: but i reckon this is something we are going to have to suck up.