There are a few things you LOOSE by going to 2.4 modules versus a 2.4 TX.

- Model Match

Model Match makes SURE that the setup you have selected on your radio, actually corresponds to the plane you are trying to fly.

I have a JR 10X with a 2.4 module, and I have several planes with 2.4 receivers bound to the module.

If I forget to switch the programming in the TX I could accidentally fly my Yak, with say, the setup for my Funtana, with disasterous results.

With Model Match, this cannot happen, the receiver must be bound AND the setup must match the plane.

- Failsafe

While the receiver provides failsafe settings, you have more extensive control over failsafe options with a 2.4gHz TX.

- Resolution

Step resolution available seems to be a bit higher with non-module systems.

There are a few other minor things that I cannot offhand remember...