The reason I suspect the appointments have reduced is no one is reporting ILs and in the other visa categories only a few IL have been sent, even some who were DQ on the same dates and not all have received IL. It's probably just my paranoia getting the best of me. But have been waiting 6 months for an IL since my date became current. Admittedly only been waiting for 6wks at London embassy, so hoping I hear something soon.
Thanks @appleblossomI'll keep my fingers crossed I hear before the end of June.