Have yet to actually play RQG but DM'd other games extensively in the past. Have ran some pretty lethal scenarios before & my main thing is just having good pre-game communication with the players. Always let them know in advance what they were getting into. Asked them to keep in mind that a hammer is sometimes; but NOT always, the solution to a problem. After being fairly warned, if they still choose to leap headfirst into the Dragon's maw screaming "I'll kill it from the inside!"...well, the results are on them. lol
Myself; if someone wants to play a combat heavy game focused on fighting & not much else, I'd just choose another system or heavily modify this one. Just from looking at it though, I'd prefer to leave things pretty much as they are. Looks like this game does what it does like not much else! Plenty of really decent games let you bang, slash & beat on things to your heart's content. Not much else immerses you in the world like this one though. Even the mechanics bring you further into the feeling that this is a "real" & unique setting far removed from the standard & often shallower fare available. Just my humble opinion of course. 🙂