Finally got a chance to take my AST off of the shelf and dust 'er off. I ran a bunch of lv70 content with it while getting it to 72. It along with SCH and DRK received the most drastic change to my hotbars due to all the pruning. But I have improved my hotbars overall. I play on controller, and I've been wanting to rearrange my hotbars to make them more practical for the longest time, but waited until 5.0 when I knew I would be forced to do it. But this change alone involves an adjustment as I rewrite my muscle memory, then there's the changes to the jobs. Needless to say, I'm not rushing through the levels.
My general take on it is not that bad. DPSing felt exactly the same as before, but AST have been at the bottom of DPS complexity for quite sometime. They were anyway. This belongs to SCH now. Pretty much unaffected by the changes to role skills with the exception of no longer having Largesse, but as an ability that was previously WHM exclusive, I am ok with this.
I had no issues with MP. Like zero, and I was spamming Gravity outside of Lightspeed along with using plenty of GCDs on Benefict II. Healing was fine as well, doing plenty of dungeons with big pulls, and even had to carry a group though Baelsar's Wall despite adjusting to the changes myself. Lightspeed+Helios still functioned just fine as my go-to for emergency situations, which I got into during the Tsukuyomi trial. The healing does feel a little weak compared to WHM and SCH, but considering AST consistently buff damage, which is a mitigatory in of itself, then that should be just fine.
Being able to extend durations was one of the things about AST I found OP and turned me off of the job, so losing this was actually more good than bad in my eyes. The card system is different, but it really isn't all that bad. I get why AST mains are upset, but I am not bothered by the change all that much. My issue is actually with Divination. If we're handing out DMG buffs all day long, then an ability that also buffs damage is just... I don't know... lame. Sorry, I can't think of a better word atm. I'd much rather this skill be something like Misery for WHM.
We'll see how the next 8 levels go, and the raidind/trial scenarios so I can see how things operate at max level along with the leveling up process. As of right now though, AST made it out ok. At the very least, getting it to 80 will be an enjoyable experience, and for me that what matters most.