One complaint I had early (Which has been heavily addressed by newer and re-worked character arcs, but still exists in general) is just that Rowan should have plans, and let the player
in on those plans so that it seems more like he's at least trying to set things up to help his cause, even when things don't work out.
Rastedel's Werden plot is a great example of that. Rowan never really thinks about his plan before or after his choice to support Werden. And given
Rescuing Delane from the Orc camp is another one. It could very easily have been played as a choice to collapse all the orc plots against each other and weaken an ally without (hopefully) anyone knowing, but as I recall the writing is pretty much just that Rowan is just doing it because he's hero, and refuses to let Delane suffer their various planned fates. There's no real planning or thought process involved. And while that's a good enough meta reason for me since she's one of my favorite characters, it doesn't feel like great reasoning from Rowan, someone darn-near worshipped by the Goblins for his planning and trickery.
Those are the big ones, but just in general it sometimes seems like Rowan isn't even trying to come up with plans and ideas for everything and that everything except character arcs just kinda fall into his lap. ...And I'll note that while he realizes the potential of winning allies to his side, he's often not the start of those plots. They often also fall into his lap at the start (Cliohna wanting a sample, Jezera trying to use Shaya to influence him, Liurial searching for a dom), and he just runs with them after that.
Hopefully the second look at Rastedel content actually makes choosing Werden a bit more transparent, not that I'll ever know. And hopefully the Goblin allies questline coming up involves Rowan actually plotting and planning. But there are definitely ways to make Rowan
SEEM more in control (He has a plan!) without him actually
BEING in control (The Twins knew about his plan and/or the plan mostly failed!)