T4 was wetter. Not sure there was much more than that. Slather as much reverb on the T5 that's on the T4, I'm not sure there would be as much perceived difference in basic 'sound'...
For me, drying up the sound is a big improvement. I usually play in fairly lively environments. Maybe if you are in a carpeted, sofa'd and draped living room, you are noticing the sound not as 'big' as it used to be. But it is fixable.
Mind you, thast brings me back to a feature I REALLY wish all arrangers (and everything else) had... A simple adjustment to overall reverb levels at the 'Master' level. If each reverb's main 'Level' parameter could be offset by a global setting, it would allow us to adjust the sound of the entire arranger in ONE easy step, and tune the arranger to the room it currently sits in.
There's just no way, basically, that ONE overall reverb amount is going to please everybody. Some need more, some need less. But currently, the ONLY way to adjust it is to edit every single style, sequence, and OTS setting. That's an ENORMOUS amount of work. When ONE master control could do it in one go...
I'd sure like to see this.
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An arranger is just a tool. What matters is what you build with it..!