Well, I am sorry to be so negative about something that has certainly cost you a considerable effort, but I am extremely disappointed.
The cap to Persistence and Resilience is somehow more realistic. It does not solve the problem of the Dragon taking 500 HP to he head and remaining conscious for several minutes. You still have to houserule this.
Rurik's rule has been incorporated into the main ruleset. Hooray!
Using an opposed roll to resist magic is ok, but as Rurik already pointed out, the old Overcharging system was not broken except in the opinion of someone who had not yet managed to understand how to use the rules. Why did you fix it?
The current combat tables are definitely worse than the original ones, except for the fact that they explain what to do in case of fumble (which everybody had already guessed). With the successful parry not negating the critical roll, using a sword to parry anything bigger than a dagger has become totally pointless. This was another part that was not broken in the old rules, it was just a matter of the players not realizing how to use the rules mechanics to their advantage.
The combination of pre-declaring defenses, Rurik's rule and the new tables, with the defender giving ground on a failed Dodge, makes Dodge not only pointless but thoroughly suicidal. A 100% Dodger who faces a 100%.swordsman has a one-in-two chance of decreasing his level of success to failure, thus giving ground (and falling into some pit). I hope i have misinterpreted the rules, because if things are as I believe even RQ3 Dodge was more effective!
Declaring reactions beforehand is certainly realistic, but using it in combination with variable CAs produces an awful result. A 200% swordsman with DEX 12 has a very high chance of being killed by a 50% newbie with DEX 13, because if the third attack connects he has certainly run out of reactions in order to counter the previous attacks, which possibly were misses. With the old rules it happened only if all three of the newbie's attacks connected.
The worst part of the MRQ rules (I must kill you to loot your runes) is still there. Remarked, too.
I am sorry to be so straightforward about it, but I strongly believe that you have made things worse with this fix. Seriously, people, I had almost managed to persuade my "historical" group to switch to the new ruleset, but if the variable CA/ pre-declared reaction matter is not revised they will just reject MRQ. I know my old players. Overall, I think that this has cost Mongoose roughly five potential customers among my mates.