Briefly, I'd like to say that I agree with lots of the points raised in more negative reviews; By Any Means reflects styles that we've seen before, much of the content is quite lightweight and there have definitely been higher spec productions. However, because I enjoy the program I tend to view those as positives.
I've enjoyed some of the techniques previously seen elsewhere and hopefully if they opt for a second season they will refine them rather than overuse them. I think there is not just space but a continuing need for material that is lighter in tone within the TV schedule, to maintain a full range of options for people. Regarding the production quality, if you enjoy a program you make allowances at the same time as you suspend your disbelief and focus on the story; if I'd been forced to sit through the episode and had found it annoying from the off then every little thing would have compounded the frustration, but happily I enjoyed it.
Less rambling. By Any Means has characterisation that is writ large, the nods to recent events are fairly unsubtle and you can rely on the twist. It is what it is, which is a police procedural with flavours from a number of family friendly programs (most obviously Hustle, I am also put in mind of the sense of adventure fun in the earlier seasons of Primeval and Robin Hood, although that may be influenced by certain actors!) Simplest way to work out if it is of interest would be to watch an episode. If you start feeling the urge to rant about licence fees part way through, or the state of the BBC, how the world was better when you were 12 and so forth, I'd stop part way through and have a cup of tea :)