I'm also making faces at the assumption that Space Marines are inherently more Intelligent, Perceptive, Willful, and...Fellowshippy than us regular Humans. Sure, they get hypno-doctrination headgear, but I think that would be better reflected in the Skills and Talents they have access to rather than raw ability.
Hmmh. I'd say at least the Willpower bonus is fine, simply due to the way they've grown up and the intense training. Regard it like a sort of "natural Homeworld modifier", perhaps, similar to what some human characters can have. It definitively should be represented (just like some human characters should have it), and I'd rather tone down the number of skills and talents they (or anyone else!) start with for sake of not filling character sheets with two dozen traits before the game has even begun. Honestly, as I began playing Deathwatch, all those implant rules were a nightmare to sift through! Way too much stuff to remember ...
Fellowship should probably depend on the Chapter, though. I could certainly believe there are some who would enjoy a bonus, just like there would be some who would be off worse than some humans.
Next, why make anything cost more XP for Space Marines? Because...why? Because they're dumber and can't learns duh stuff wut we does?
Come to think of it, one could make an argument about how Marines are already close to their limit once they begin play, and thus have to "pay more" for pushing themselves further. That was my thinking behind giving them smaller Toughness and Strength advances (+2 instead of +3), anyways, though I could also see it being applied to xp costs, and to certain skills or talents.
It probably depends on what one would have them start out with, and how one envisions their role in a high level campaign - essentially those exceptional humans that are the player characters having a chance to sort of catch up with them, at least in some areas (though I could also see the possibility of using rare/expensive bionics to come close to bridging even that gap in Strength and/or Toughness a la Colonel Straken).
This could of course be a non-issue if we consider that some archetypes of human characters such as Inquisitors or Storm Troopers could have a somewhat similar range of skills and talents right off the bat.
Edited by Lynata, 09 November 2013 - 10:17 AM.