Honestly, what do you expect of those guys?
Yes, there has been (some) criticism but there has also been a reaction by Matt Sprange, namely a Player's Guide being published for free (to be found here: http://www.mongoosepublishing.com/pdf/rqplayersguide.pdf).
That document is going to be updated, at least that's what Mongoose claims and I expect them to do it. But there is no need to tackle each and every problem there might be on an official level immediately. I'm quite sure that the Mongooses watch the RQ forums very intensly and keep track of everything that might be probelamtic and needs an article in the player's guide. And the people here seem to do a fine trouble-shooting job at the forums as well: Every post about a (new) problem is being answered by numerous people with rule interpreations and house rules. RuneQuest once again is a system that's alive: it breathes, it evolves and it will see new releases on a regular basis. What could you want more? That is the best that can happen to a well liked RPG IMO.
Give the Mongoose the benefit of the doubt, that they'll handle things well. They have rocked more often than they sucked at new games!
On the note of the splitted corebooks: This has been done before...what was the name of the company that is a major publisher of one of the best known RPGs right now?
They have splitted their core books into three titles as well and they are more expensive and more complicated. I'd love to have a combined book made up of the companion and the main rules, but Mongoose Publishing made their decision. I don't see them coming forward and saying sorry for it, neither changing it anytime soon, at least not until the first printing run of Main rules and RQ Companion has sold off completely.
I for my part am very happy with the quality (both game system and product quality (like binding)) of the publications by Mongoose and I will want to see more of the line, before I jump the gun.
Just my thoughts, we can always agree to disagree ;-)
Edit: And it is friday night, the guys probably should have a little time off every now and then, to play their own games perhaps?!