As far as the view worth the climb, I'm going to back Wayne up her. I'm no frsky expert and my exposure to opentx is just from what I've read in forums. I jumped both feet, into ethos.
What I can speak to is the older Spektrum and Futabe radios of 8 to 12 years ago. The transmitter programming of those generally hasn't changed much until you get to the NX series spektrum has.
It's water vs wine. If opentx can get into the same room as erhos as far as capability which Wayne and others have all said it can and then some, the climb is definitely worth it. I don't know Lua scripts or how to use them but the online repository for them is pages upon pages.
If you can think of it, there is probably a Lua script that will do it, in terms of rc. Just a matter of downloading it, running it and setting it up.
Take the leap. You'll be glad you did.
Not even flying my frsky equipped radio or plane, and already in love with ethos. It's like my wife, I don't fully understand it, but I love it. If OpenTx is like that...yeah..you'll never look back.