I think the abolish Holyrood lot are deep down, cowards.
Imo, many of these folk are uncomfortable with having to engage with the many socio-political issues we have in the UK/Scotland. Having the parliament in Edinburgh closer to home alongside the big constitutional elephant in the room, forces these people to engage in politics. Easier for these folk to ignore this sort of stuff that may not directly inconvenience them, if it's far off in that London.
I think it's fair enough to criticise the SNP on their record and think they're doing a shite job. However, if you want the powers returned to people capable of making an even bigger c**t if it, as the last 20 years of Westminster bin fires proves, than as I said, you're either a dribbling simpleton, or a coward who is not really that bothered about welfare, education etc in the first place.