To my knowledge many people use TTT and the SDR# plug-in with success. Even just using the plug-in with success.
What "experienced issues obtaining such data" do you refer to? Only with feedback can something be improved.
The plug-in I have modified (to work with TTT) decodes just about everything from the physical layer to layer 2/3 protocols (MAC, LLC, MLE, SNDCP, CCME, MM and audio) as well as showing the activity of encrypted traffic to some extent, I don't think any of the other TETRA decoders does this.