Fun read, but...
I get in and crank up. No Take On Helicopters flight model here unfortunately, but I keep reading that some developments are coming for Arma 3 that will introduce some more advanced helicopter dynamics apparently...
Don't get your hopes up too soon. The current flight model on Dev branch is very frustrating and there's lots of stuff modeled incorrectly. I haven't messed with the latest update, but I believe there's still some very wrong aerodynamics still being modeled.
In other news, you can shoot from vehicles!
My hopes are already up
There are indeed some very wrong aerodynamics, but BI is working on it. Tunes and tweaks to the FM come with each Dev branch update (which have generally landed every week day). It's clear they're still feeling things out, and I suspect this will continue to evolve over time. They've also just now updated to a new version of RotorLib (a 3rd party library), so there's growing pains to be had.
I won't say it's perfect, but it's a heck of a lot more fun than the stock model already.
In addition, the FM's have been opened up to the community now, so tweaks and feedback can be crowd sourced. It also means the future looks bright for A3 Helo ops, as third party models can feature an AFM. This sets the stage for A3 to become the "Strike Fighters of rotary flight": What it lacks in systems depth, it (potentially) can compensate for with content breadth.