It seems most people agree overload is a bad thing to put on a card, not a good thing, but to me it almost sounds like you're arguing it's a good thing. Even though it gives you a (small advantage) having overload is seen by most people as a bad attribute to a card, in this case, not good enough to offset the temporary 1-mana advantage imo.
Overload is from from the best class defining trait in the game, but it isn't an inherent negative. It allows you to make very powerful tempo plays in the early game. I would agree that if you are forced to play off curve that it doesn't work out that way.
I think the main reason people see overload as a negative is because sometimes you want to make a certain play, but you are overloaded, so you can't. But that's the price you pay for having a more powerful turn than you were suppose to the turn before. People tend to focus on the negatives so being overloaded feels worse than it feels good to make bigger plays the turn before.
It is more a psychological problem than anything. The mechanic is very balanced.