Nice to read through this fun thread again.
All I can say is I too sold my fEARful (and have sold every other 'LF' based cab I've owned). You hit the nail on the head. That big low end extension of the LF driver with very little low mid presence (it is a speaker designed for subwoofer applications) has a 'sound of its own' that is definitely not my thing. It emulates a PA... very deep, very wide, not particularly punchy, with a bright spike of upper midrange (at least with the original crossover and the 18sound mid driver).
That isn't a bad thing, but it slots your bass in a mix quite differently... sits kind of 'under the band'. I missed the clear, punchy articulation of a high quality more traditionally designed bass cab with a stronger dose of low mids through mid mids, a bit less low end extenstion, and to me, a much nicer top end (less spikey, with the dips and peaks in more 'musical' places). And, as you found, as a positive, you can get away with MUCH less wattage and slot into a mix much closer to what you would hear in a nicely mastered recording.
Different strokes, and not 'better or worse', but I was never able to dial that sort of 'post mastered sit in a mix' tone with any 'LF' loaded cab.
Others, of course, love them. If I was doing a dub gig thing, I'd still be playing the fEARful... amazing, full, open low end.
Listen with your ears, not with your eyes. If you like the tone and performance of 'rig x' better than 'rig y', then for you, 'rig x' is better... period.
Edit: Just FYI, I've found the best execution of a mid driver loaded cab with powerful 'pro sound' drivers is the Baer stuff. The Baer ML212 (again, always easy to spend someone else's money, but just something to think about), is a high sensitivity cab using OEM tweaks of the 3012HO drivers... moving them a bit closer to the low end performance of the LF, but still sounding more punchy and articulate and warm. Roger also uses a MUCH better sounding mid driver for bass guitar (IMO and IME)... one of the Faital models, and due to the HO drivers, he can cross them over quite a bit higher than the fEARful cabs, so you get a more traditional 'bass cab' tone (punchy, warm, organic up top) with still a good dose of the advantages of pro sound quality woofers and a mid driver. VERY nice cab that kind of sits between your fEARFul and the Hartke. Relatively lightweight. Wonderful cab, 4ohms. My Bergantino CN212 is smaller and lighter, and tonally is a bit closer to what I prefer, but the ML212 is a wumper and takes aggressive overdrive tones wonderfully also. Just FYI, and Roger's cabs are available 'down under'