The FAA does not want anyone flying anything. Period.
They (and the general public, and big delivery companies) want something done about drones. I agree with them, irresponsible use of drones is a plague and a danger to navigation, and should be controlled in some way. When they went to define "drone" (UAS), there was no obvious way to exclude hobby LOS R/C from that definition. I don't think they care anything about RC or do they have any real intent or motivation to control it - it just made it easier on them to not bother to distinguish them from the drones that they DO want to control and should be controlled.
The AMA initially went along with them on that, they *didn't want to make the distinction* because they wanted to cash in on the drone boom ("cash in" being defined at the gatekeeper for legal/community-based organization for drone operation and thus get the associated ad revenue). Far too late, they realized the danger, and as a diving catch, came up with the idea of getting first in line for the FRIA sites.
This has accomplished most of their goals - because so far, the lion's share of the FRIAs are AMA-affiliated flying sites. If you want to fly without a transponder, they are the only game in town, and, the entire idea of an FRIA and that it allows you to fly without a transponder is definitely a positive for AMA members. Just not as positive as it might have been had they disavowed drones, made clear distinctions between drones and hobby LOS R/C, so they could have legitimately defended the Special Rule for Model Aircraft.
Of course, it is possible that the AMA would have gotten rolled over even if they had done everything sensibly, because *drones were always going to get regulated*, the AMA is a tiny bit player in the face of Amazon, UPS, Fedex, etc.
Ultimately, all this is very unlikely to make any positive improvement in irresponsible done use, because the same people with the irresponsible behavior causing this in the first place are also going to ignore the transponder and registration rules, and will only wind up with a transponder if it happens to come in the drone from the factory. Those intentionally causing harm are obviously not going to register either and will defeat the entire scheme. Already there are legions of youtube videos showing how to disable the transponders. So as with most attempts to modify behavior by the government, the entire thing will do nothing to accomplish the goal, while burdening the responsible users who were never a problem in the first place.
Brett