I wouldn't say it's essential outside of combos, but I like it as it destroys a good amount of the opponent's red health, and gives you a bit of health back. The EX version also makes for a gimmicky reversal, as it has invincibility on it and can catch all kinds of things.
I generally try to mix in the command throw with staggered block strings.
On crouchers that 5A whiffs on, you can do a quick 2A (5A) A.throw
2A 2A B.throw/slight pause A.throw
2A, slight pause, A.throw
2A 5B B.throw (you need to delay the input on the throw by a hair or they won't get caught by it).
And you can always sub it in for the normal throw any time you have the time for its input; EX version for poke-proofing if you have the meter and are doing run-up-throw or something. You want to go easy on the B version, as it telegraphs its startup with a fairly unique animation. Of course, these are only for people who have a measure of respect for your pressure. If your opponent's poking at every minor gap, then you're better off focusing on staggering pokes for free combos.