You don't have to, if your cab is the Marshall in your signature (GB X EVH) you're not gonna find many speakers with MUCH more bite than that (there are, but neither the EVH or the GB RI are super smooth). Going stomp might be the best choice. This one's a fine ass pedal
Most Friedman are inherently smooth and polished in the upper end, which makes em very pleasing (for most folks) when played alone, but not as cool when playing in a band.
IME a V1 swap can help but not make a world difference (and no, don't trash JJs as they are reliable - which is something...
2203 with booster is cooler, the old fashioned way, and sounds more pissed and abrasive than a Yeti, no doubt. The Yeti is hot rodded, the JCM800 is Metal.
The Chupa has much more aggressive upper freqs and cuts much better, the Yeti is ballsier and fatter.
If you're a fan of those modern super aggro focused 'shall mods you often see here (which are arguably Marshall related anymore), go with the Chupey. You may dig the Molecular more than both.
The KK is one misunderstood amp, no good demos and those who have compared it to a CCV (which is said to be its model of origin, which really isnt tho) suggested the Cameron was just much better sounding.
So yeah, maybe it's just a not so great model.