Why did they make SMN harder to play?

[Galvuu]

I said in another thread that, on a deep level, SMN and BLM are very similar if you want to execute them well.
What I meant was something you highlighted- you need, on both jobs, to have an extremely precise planning of your cds to do well in a fight. We're talking down to two seconds or so here. Further, both jobs might need to adjust their rotation in advance due to upcoming mechanics.
SMN has the added issue that a critical failure is much more punishing (death), where BLM can still somewhat recover within 15ish seconds (although that's painful too).

Pets are, as you said, a clunky, unresponsive mess (3.4 Garuda flashbacks for me).
Why? I think they just don't understand casters very well.
I know this is a painful answer- painfully useless too- but given this whole BLM and SMN fiasco in 4.0... I just think these jobs are a bit too complex when you min/max them for the dev team to see these things coming :/
I'm sure they dummy parsed this and went "great!" and failed to predict what issues would be hampering all this in an actual raid.
(Heck, they probably didn't even parse BLM, because they come out the same).