SA-MP scripters have so much code bound to enum style structs. I doubt this would be an easy transition. I do like what it has been replaced with. There is a much cleaner way of defining structs now and accessing member variables.
I think scripters could easily get used to new things. I think it should be updated to the newest version. I'm not saying it should be done in this SA:MP version (0.3c), it could be done for 0.3d version.