i can't even get multiple agencies on the same system to agree on having common MA channels in their radios. many will say i don't want more than X channels in total because the guys will get in teh wrong zone and be lost. other agencies want EVERYTHING in them, some APX units i programmed have VHF MA, 700 MA, 800 MA, as well as system specific MA channels. the ones using those radios stay on 1 channel 90% of the time, the rest of the time is switching to a FG or maybe SO channel. the other 500 channels in the radio are never turned to.
i think it would be great if they had a default personality or even a few pers that had all teh channels in them already, but even so every agency is going to want them in a certain place, in a certain order, and with certain features(scan/no scan, rpt/dir button or use 1 channel duplex and another simplex) so much so that it would be impossible to standardize.
MSWIN has certain required MA channels for 7/800 mhz, they MUST be in all radios and in a certain way. even so, some agencies i deal with have asked me to remove them. i tell them i can't because that is what teh state wants in there so it stays. if the federal governement(where all the grants come from anyway) did this, then maybe there would be a chance for some standardization, but i don't look for that to happen anytime soon.