Ok.. this is the problem though.. if bad players can't get credits when they are easy to earn.. then they will have an even harder time when they are harder to earn...
Although its true that the bad players will get credits even slower they also can not loose them. The thing with bad players is that in general they will be just as bad with the Laser Gun and Light Armor as they are with the Rifle. That means they tend to be just as easy prey even when they are properly evolved or equiped. Either because they simply can't aim or because they make bad decisions.
However, I think as far as bad players go, it is more frustrating for them to finally collect enough money for decent equipment or evolutian and then get mauled a minute afterwards and end up back in square one than it is for them if they gained their equipment and evolution states more slowly but not be at risk of loosing if they are killed.
I also think that not giving nearly as much point to the players with the more advanced evolution states or better equipment would encourage them to 'play fair'. That is to not use all their points up to maul a team full of poorly equiped players.
Let's assume for example that a Dragoon gets 0 points when killing a basic Marine with nothing but a Rifle. While the Marines with the Rifle would get 100 credits for killing a Dragoon. Clearly the Dragoon while he would be able to kill more players as a Dragoon would opt to evolve into say a basilisk instead so that he can actually get more points to evolve when he has access to Advanced Dragoon or to Tyrant, that is if he doesn't opt to simply take out the Marine base and end the game to begin with.
Bad players will of course get their credits and evolve points slower than the good players. There's simply no way around it. However, in the proposed Game Mode, the bad players would be able to advance even though it would be slower than the advancement of the good players simply because they don't loose their hard earned credits and evolve points. This is compared to the same bad players being able to finally buy their equipment or evolve state and loose them right away because a good player will take out a bad player anytime hands down no matter what equipment the bad player has equipped.
If the bad players advance so slowly that the players in the other team are far more advanced than they are then the game should end and the teams should shuffle their players. But in most cases there will be both good and bad players on each team and in these instances bad players would be given a bit more advantage because they gain much for killing the good players while the good players have little to gain by killing them. That joined with the fact that they don't loose everything they've earned so far because a good player can take out a bad player regardless of how well equiped the bad player is, should give the bad players a bit more of a sporting chance.
Of course I can see how the good players who seldom get picked off by the opposing team will totally hate this idea because it takes away their ability to kick away at the opposing team's players when they are down to keep them there, but that's only to be expected.
I mean people who are on top will always scream "Why don't you just improve your skillz?!" when it comes down to making features that give newbies a fighting chance and which prevent them from getting frustrated away from the game. But honestly, everybody starts out as a newbie and there should be atleast a game mode which is newbie friendly so that they don't get frustrtated right at the start. I totally agree that the current game should remain intact as a seperate game mode though specially for Clan Matches and such where you can be assure of the skill of the players in the game. However, when you can't be sure of this, I think newbies should be given a fighting chance and I think this would be the best way to handle that.