A (potentially) controversial piece of speculation, not aimed at anyone in particular;
The number of people complaining about UK Gundam Availability > The number of people that are up to date (have watched all of) the UK Gundam releases so far.
Whilst I can understand complaining about availability of a series that you are up to date on, complaining about one that you are not up to date on (IMHO) is kinda rude. Given that the releases so far are mostly quite long series I find it hard to believe so many people are up to date. Of course there will be those who are, and those people are (IMHO) entirely entitled to be frustrated with delays, but for those who are not, perhaps you need to consider your own rate of progress (Again IMHO) before complaining.
The key word here is speculation - I'm not sure how you can say that first statement with confidence.
Remember, ZZ was never released officially in the UK (I don't believe), so I think it's fair people wait on that to come out before they dive in and also, since when was it a bad idea to shelve something until the rest of that series is released, especially in the box set binge culture we now have in the west? Only case I can think of is for video games, as you wouldn't be keeping up with the hype.
It's not like these Gundam shows aired like last week so people will not have missed out on all of the lovely community related discussions that we see nowadays for simulcasting shows, these titles are old, some of them older than many of the members of this forum and so watching it in their own time is COMPLETELY understandable. We don't see delays like this between parts/ seasons for other shows, and the US are seeing a tight release schedule while we were promised something similar, so I think it is fair for people to complain. As customers we are all entitled to be frustrated given the promises made and, as someone who has watched the show as it has been released here in the UK, I think your passing of the buck onto the consumer is unfair - what if your speculation is wrong and it's actually the opposite scenario, what then? Even if it is correct, is does not absolve AL, it is none of their business how quickly customers watch their releases, given those very customers have already paid good money for that privilege.