I understand the hassle of removing the module in order to fit it to a radio case. However, it's just a small inconvenience compared to the rewards.
As for the antenna in the back, it took me a little while to get used to it and not have to extend an antenna out of the top of the radio. However, now that I'm used to just turning on and driving, it's nice to not have anything flying in front of my face (like an antenna) that would distract me from my view of my car on the track!
So, on the one hand, you have an extra step in removing the module from the transmitter when putting it away in a case. On the other hand, you have one less step in extending the antenna. Hmm... seems like the negatives cancel each other out!