I agree she was justified in that regard...but I also think it would be interesting to see her descent into madness.
After all, the early targs seemed to be very much 'do what I say, coz I've got dragons'...I can see her going the same way.
She walks a very fine line between justifiable behaviour and being a monster. On the one hand, she is a saviour and freer of slaves; on the other hand when crossed she is absolutely merciless.
One thing I do wonder about - King Robert wanted her assassinated when she found out she was pregnant, so clearly realised that the remaining targs were a threat.
Now she's conquered half of Estoros (or whatever it's called), has an army of the most deadliest soldiers going, three dragons and is calling herself queen of the Andels, rightful ruler of the seven kingdoms and no-one gives, well, a mummer's fart as Tyrion might say.
I think earlier on in one of the series it was mentioned that she might have dragons and this was dismissed as foolishness, but surely there must by now be so many reports that it's harder to dismiss?
It seems very odd that the threat is just allowed to grow and grow, mind you I suppose they have there hands full enough in kings landing.