Personally, I think stating that the Head of Development should 'hang his head in shame' (my interpretation of your words) is a bit harsh. More so considering that, and I'm assuming here, you don't really know the issues they faced nor the constraints (see above) they have to battle every day. I happen to know him, and I can promise you, you will struggle to find a harder working, more dedicated, more loyal and more enthusiastic person in MMC or any other business, and at my age, I've seen and been involved with one or two.
You are correct that we tend to overlook faults, maybe more so with MMC than elsewhere (though most probably applies to Caterham also?), but I have a theory of why this is true. IMHO I really do think that were we not able to do so, we genuinely would not have these vehicles at our disposal; from 4/4 to Roadster, plus 8, 3W to Aero. It just would not be feasible to develop and sell in small numbers as the development costs required wouldn't work with the relatively small numbers of vehicles actually wanted. They are niche vehicles after all. We would therefore all be driving VW's or Toyotas with an Eos or a Celica (or new GT86? Thingy) as our 'special car'.
Bang on Boshers. I consider it amazing that the likes of Morgan and Caterham have managed to keep up with the ever rising tide regulation to keep the cars we love in production. As you say, the alternative doesn't bear thinking about.
To steer the thread back to the original question, I suspect that as several of the aero contingent, (all accustomed to the shock and awe of the mighty BMW V8), who've taken delivery of 3W's find the power output adequate......then it probably is.
