I don't understand how you can say this, then say this:
It WOULD make sense, IF there weren't enough computer spikes in game to have 0 ranks in the skill, and still "hack da gibson" and avoid battles. If the consular has advantages, and access to the Sentinel's ability to avoid battles, hows it balanced?
Because there are more skills than hacking and because I didn't find that many spikes. Comparing my first playthrough with my second I found that computer made a HUGE difference (I maxed it the second time). And I picked up every spike I could find.
Anyway, it's all pretty moot since even if there were enough spikes in the game it doesn't necessary mean it's the Sentinel that's unbalanced, I'd rather argue that it's the consular that is unbalanced (as in overpowered, my definition). Comparing the three classes I'd say the Sentinel is the norm (ie balanced), the guardian is underpowered (my definition) and the consular is MAYBE slightly overpowered (again, my definition).
As for balance vs power, I think the two terms are fairly interchangeable (in the context of a computer game). But it's already been established we have different definitions of what underpowered means so arguing about it is fairly moot.