Hmm, agree with many of the points in the thread, disagree with others.
I'm somewhere in the middle ground. I don't think series 8 was as dull as many make it out to be, nor do I think that this year's candidates are as hare-brained as they are being made to look.
Last year's finalists weren't the most interesting bunch as a whole - but then that's the same most years, as the 'big' characters always tend to fall in the week or two before the final - Adam Corbally last year, Stuart Baggs, Tre Azam and so on. As Monkseal says, there were some poorly thought through tasks - the fitness equipment one was 'won' by Stephen throwing in lots of freebies which didn't count against him as the task was measured on orders only, not profit. But then season 7 had Jedi Jim Eastwood offering to promote his crappy biscuits with a multi-million pound campaign which was clearly implausible in the real world - again, as it was based on orders, he bent the rules rather badly here.
Similarly, some of the narratives were odd. I'm still waiting for Jane vs Duane to kick off.
This year's candidates are doing some very silly things - but then they do silly things every year. What we're seeing is a complete lack of coverage of candidates doing good things that help win the task. It's almost all the bad stuff we're being shown, so there's no balance. That's not the candidates - that's the editors' choice, which in turn starts with the producers' direction as to how they want candidates to be portrayed to fulfill this year's various narratives.
All this means that I'm finding it harder than usual this year to spot who the good candidates are, simply because we see so little of anyone looking competent. Most of the surviving candidates have had good moments, but too many of them have been shown only as not making lots of mistakes. In the past, it wasn't too difficult to identify most of the finalists early on: Tom P, Tom G, Helen, Stella and so on.
This is at odds with the whole premise of the show. Successful entrepreneurs are not by nature people who avoid mistakes - they are the ones who takes risks, have moments of genius, and act decisively to correct the mistakes that are an inevitable part of taking risks. Ask any truly successful entrepreneur, and if they are being honest they will tell you that mistakes are part of the process - they make you better if you learn from them.
Anyway, back to the original question. Series 8 is relatively low down on my list of favourite series. It was more flawed than most, less entertaining than many, but also one of the more business-focussed ones of recent years. I'd probably put it ahead of series 3 and 5, but behind most of the rest.