It's not a F2P model at all, to be precise, it's a change to the "trial" system, changing it from a 2 week full access trial account, to a long term/indefinite limited access account. There is no FTP for the regular game involved in my idea, never has been, nothing would need to change in terms of how the subscription system works now, including the rate.
HT only made comments on a completely F2P model - I'm not suggesting a FTP game, I made it very clear 10x now that the current sub system and rate could stay the same, and that the only "free to play" would be the open slots in the MA (which is 99 percent of the game, including scenarios) being filled up with free trial accounts with limited plane/gv/etc capability. Since those slots are empty now and not drawing in any revenue, and since that a huge swath of the "problems" with the game are directly related to low numbers, what would the harm be in having them filled up with POTENTIAL additional new full accounts. Again, it would benefit the regular pay/sub system as a percentage would subscribe to get access to what they are seeing yet not getting to use, while giving those who already sub to the game more targets, a full arena, etc.
The major problem I see with this idea is that the game would be so popular that the free trial players would be fighting over the available empty slots, and HTC would be faced with either having to expand the arena sizes, or do splits into blue/orange and have to add a bunch more colors to that, in order to fulfill the demand. I have no idea what the cost is to HTC in terms of bandwidth per player, or how that affects the game in terms of it working well still and being lag/etc free, but this seems like a 1st world problem to me.