Unfortunately while TD-50 module is improvement over TD-30, but the sound are not up to vst standard (at exception of the cymbal)
And that's because the TD-50 is just an incremental improvement over the TD-30. I'm sorry, but Roland's top of the line Vdrums product was only "revolutionary" when they released the TD-10 back in 1998. Since then it has only been incremental improvements (Which is good). You can see it when you compare the TD-10 thru the TD-50 side by side. (TD-10, TD-20, TD-20x, TD-30, TD-50)
I only point this out, because many seem to think that every Roland release is somehow a major game changer.
There is a reason for these same path, they are not changing their core structure to avoid larger cost, a module like MIMIC will cost for them about 5000USD, Roland 3x time the price if they would do it in 2016 with distribution world wide and supports\parts + profits.
Roland is using lower amount of wav files for their (complete remarks) instruments layers (outside their single shots wav) and lower memory on the module and they compensate these a bit to increase the realism on the sound with real-time filters, alternating the start point of the wav triggered, tuning etc antilogarithm for position sensing as showed below in the attach (click on these image to show larger), these technique are used same for their COSM (tuning\depth shell\muffle\head type\thickness,beater type\sizzle\strainers etc are depend on the v-editing are Filter\Tuning\ADSR\ Simultaneous sound, on\off switch described as drum with picture, they are using lower amount of wav files as base core sound and alternating the sound with your desire on\off switch on the v-editing and using real-time technique wav manipulation starting point with the speed of the stick for swell cymbal, position sensing etc. These have been since the start of TD flagship while their previous latency was higher then 3MS as they are in TD30\11\15, it is much easier to have faster loading time when you have lower instrument wav accessing on a single users kits then GB of wav on a single users kits. This technique is very useful to save memory and cost production for Roland (and enabled easier supports\shipping\parts for 7 years availability world wide possible), but at the same time add some unwanted sound characteristic and potentially increase lack of variation on the sound realism. It's basically a synthesizer functionally (hided with drum name and picture) and wav files build for drummer interaction playing surface and editing.
The new snare pad show here (8:00) TD-50KV(A) video at
https://youtu.be/lKO_MGMcXD0?t=479it show 4 cone:
There is probably others piezo, in the Roland web site they said 8 sensor, or some are hided for the cross stick
-Head sensor
-Rim sensor
-Position sensors x 3
-Cross stick sensors x 3
-Head and rim are in the middle cone, top and below underneath the cone for 2 piezo.
-Position sensor are probably the 3 cone around the middle one for 3 piezo
-the cross stick sensors are probably hiding around the edge\rim area for 3 piezo.
Which will give total of 8
After I saw the instruments DATA list
https://www.roland.com/us/support/by_product/td-50/owners_manuals/ they have 4 full kit that match, Bass Drum \ Snare \ Toms
-Jarrah Ply kit
-Bubinga kit
-60s Round Bearing edge
-70s Stainless
-2 Type ride available
-2 Type hihat available
-2 ride type supports position sensing
-5 toms type supports position sensing
-5 snare type supports position sensing
Most important are these remark below for the individual instruments which are more "advanced", all others sound without these remark are basic.
*P=Can get various changes of the sound in accordance with the positioning where on the pad you hit with a stick. In rim sounds, can get such various changes of the sound in accordance with the depth of the stick on the rim.
*M1=Mic Position, Mic Overhead, Mic Room, and Mic Width are supported.
*M2=Mic Position, Mic Overhead, and Mic Width are supported.
*X=Rim shot and cross stick can be played separately.
*T=TRANSIENT is supported.
*D=Dynamic Enhancer is supported
if it was me, I would removed all fx-dance-DJ-percussion and put them in a cd as option with the package for importing wav and make more memory space..