Eh at the end of the day though they all do offer room for skill to shine through. As simple as ret may sound if you aren't good at lining up cooldowns (and with your trinkets if you can) you won't do as much damage as someone that can, all 3 of your HP building attacks can offer different situational uses (normally exorcism > CS, but if you know ahead of time you are going to be out of cs range in a matter of seconds it's better to cs first), trying to not refresh inquisition until the very last second, etc. There is a lot of nuance to be had there as well, and, every rotation in the game is like that and for the better. They just achieve them in different ways.
But that said, TheYanger is right, the core abilities of Frost is very few buttons in the grand scheme of things. Hell, if you don't want to manage Bloodtap or plague leech you can drop them. In reality while those 2 talents are the highest DPS they are barely ahead of the other choices according to the 5.2 EJ frost guide(we're talking like within a few thouand of each other), and, if you aren't very good at using them it probably ends up being lower DPS than the other talents anyway. I don't use plague leech myself because I am not a big fan of how it makes the rotation feel but according to the sim data in that thread I'm only losing about 1k potential dps by not using it, 1k means almost nothing at current dps levels, I mean, not having to pay attention to that can free up more time to try and get more km obliterates in or bloodtap better.
But that said, TheYanger is right, the core abilities of Frost is very few buttons in the grand scheme of things. Hell, if you don't want to manage Bloodtap or plague leech you can drop them. In reality while those 2 talents are the highest DPS they are barely ahead of the other choices according to the 5.2 EJ frost guide(we're talking like within a few thouand of each other), and, if you aren't very good at using them it probably ends up being lower DPS than the other talents anyway. I don't use plague leech myself because I am not a big fan of how it makes the rotation feel but according to the sim data in that thread I'm only losing about 1k potential dps by not using it, 1k means almost nothing at current dps levels, I mean, not having to pay attention to that can free up more time to try and get more km obliterates in or bloodtap better.