I actually think that 4e encourages focusing on one area of expertise. When you do a character like this, some people then say is an example of making a "one trick pony" character.
I disagree. I think that one trick ponies exist, but they are even more specialised than just someone putting an 18 in one stat. Most of the true one trick ponies are in fact using a ton of feats and items to make their tactic work (often just using one at-will repeatedly) whereas a focused character can still make use of several tactics and still have his "18" stat.
I actually think the game is more fun with focused characters working as a team than having a team of broadly skilled characters. With broad range of "average" abilities, your characters end up having more similarities which I don't think is anything to aim at.
So, back to the actual subject. Even if you do have 18 in stat(s), you should still not be totally gimped for having low NAD's. Maybe one defense can be really low, but that is part of the game - it should not be a big problem unless the DM purposefully overuses attacks vs. one specific defense.
I disagree. I think that one trick ponies exist, but they are even more specialised than just someone putting an 18 in one stat. Most of the true one trick ponies are in fact using a ton of feats and items to make their tactic work (often just using one at-will repeatedly) whereas a focused character can still make use of several tactics and still have his "18" stat.
I actually think the game is more fun with focused characters working as a team than having a team of broadly skilled characters. With broad range of "average" abilities, your characters end up having more similarities which I don't think is anything to aim at.
So, back to the actual subject. Even if you do have 18 in stat(s), you should still not be totally gimped for having low NAD's. Maybe one defense can be really low, but that is part of the game - it should not be a big problem unless the DM purposefully overuses attacks vs. one specific defense.