The message this will give players in some way shape or form is: "If you don't play the full game, you don't get the full reward. Period." Which isn't all that great when the mindsets and "potential attitudes" of players are somewhat related to the game modes one chooses to play. It all boils down to Competitive vs Co-operative. Players are already divided with this concept, rather than brought together. Then you have whatever sub-categories (think of the playlists in PvP, or the different PvE "modes/features") further filtering players into more "groups" of some sort (think of how this can affect matchmaking). Some may only stick to just one or two "modes", based on whatever limitations that player feels exists. Don't get me wrong, there are plenty of arguments for both sides, and they are both compelling in their own ways. But that's only if you consider the above concept of "player mindset" vs "player division". It all a shame though, considering the work that goes into the game as a whole, because at some point, it'll never be enough.