I can't believe what I'm hearing, clearly you have never even ran a GR2 on an L body and a Sensatrac. If you take a wasted set of GR2s, then drill holes in them and leak out all the fluid, then bolt them back on the L body. You would have a brand new Sensatrac. Those POS struts last about 6 months before they are so sloppy you have to take them off. Handling under braking, launching and turning is destroyed by those things. Sure, my Koni's are really nice, a lot stiffer than a GR2. But a GR2 is about as stiff as stock and they have a livable ride quality for daily driving. Even on low the Koni's beat you pretty hard unless on smooth payment.
Granted the GR2 isn't all that, it is a real good shock on an L body. Not a great race shock though but those racing should just step up. What would be great is a gas adjust strut and shock combo that they don't sell. But hey, a GR2 will give 70% of the handling you want from a shock. And they are compared with a shock that gives you (and this is giving them credit) 5% of the handling they should. As an example of the type of person that owns a Sensatrac car. I did a full turbo swap, larger late turbo auto trans, 4 wheel disks SLH 3 with 5 lug and SC front suspension and steering into a 82 Rampage. Customer got a set of wore GR2s with the deal, they were about 50%. The Page handled well and had a good ride but it just Jarred the 80 year old man too much. So he paid me to install the softest, weakest, sloppiest shock I knew of, the Sensatrac. Instantly the nose dropped almost an inch with the lack of support and you can hit a 4" pot hole without feeling it. Along with this it is flat scary to drive fast (in a bad way).
Maybe on some POS import they valve them different and they don't handle and support the suspension. Could be the case. On OUR CARS this statement is miles away. This again isn't talking up the GR2s as a really great performance shock, but comparing them to the Sensatrac is just total slander
On a Muscle car they are nice though, full sloppy weight transfer with just BARELY enough valving to keep them from doing the non stop bounce of a drilled shock. I like them better than my Competion Engineering adjustible 90-10s, as even they don't come up that fast. You'll swear the front tires are off the ground!