Lol. If you haven't experienced your chars progression from lvl1 onwards you dont get a proper feel for its abilities and timings. Rotations wont flow as well and such. You need to be able to learn to integrate each spell as you learn it and use it for a few levels in your rotations. Then when you get new spells you know their place.
I agree, if you're a spastic gamer.
Some of us are MMO veterans, or just decent gamers and can pick stuff up pretty fast, research helps too.