Was it really necessary for RM to release a memorial sovereign? A memorial coin is understandable but did it have to be the sovereign? And the increased mintage numbers, along with the other new releases just floods the market with "special" design sovereigns. The increased RRP makes it harder to hold their premium and generally doesn't sit well with many customers as the feeling of it being a money spinner takes the gloss off the actual product.
Credit where it's due, for all the criticism of their quality control, over 95% of the census achieving a 70 shows a high production standard, but makes them not really any more valuable on the secondary market. So you now have customers covering the grading costs and not really seeing any great return for their efforts, if they choose to sell quickly.
Mid to long term, who knows what the future holds. All of the one-off designs have a lot going for them. But what will the market look like in future? RM will surely have to tone it down with all these new sovereign designs, but there's no guarantee of that happening. What if there is a new monarch again soon? Are we going to see this repeat itself? It's too much already imo.