It’s the people who have never actually owned Wilsons who seem to criticize them the most. As an owner of the WATT/Puppy system all the way back to 1986 (Puppies came out in 1988), I found little to criticize other than an overly tight treble, and congestion on big crescendos (Prokofiev's Scythian Suite could sound very bright on the first generation WATTs).
Otherwise, having lived with them for 12 years, I don’t seem to have heard all the "flaws" that so many others have. Funny, innit?? People who’ve heard a speaker for - perhaps - 10 hours total have more to say about them (and not positive comments!!!) than those who have owned it for decades.