I just don't trust Saitek and I haven't heard anything about Logitech improving their quality since they acquired them. I don't see why their high end stuff don't use hal sensors or whatever like Thrustmaster's but still rely on potentiometers and springs.
I wanted an X55 for forever when it was first shown but then there were tons of complaints from the first buyers about the actual build quality not reflecting the external looks and premium looking switches and shit and I haven't seen anything about X56 being that much better.
If I bought hardware with potentiometers it would have to be of the CH Products line. A Combatstick (or slightly cheaper lower end Fighterstick, it's the same but with buttons instead of multiple hats so less inputs overall) with the Pro Throttle (still single, fighter style) and pedals. Availability is absolute shit outside the USA however and prices can be inflated at times but if you're there and can find it for good prices it's immortal hardware. But only with pedals as a must because the CH sticks don't twist.
The FCS is the opposite, cheap externals but solid function. I only have the T16000M for now (the previous green revision) and it has a pitiful amount of inputs but the throttle and pedals would fix that for the most part and it's precise as fuck with zero deadzone needed. Since I don't have a throttle or other gear I use it in combination with the keyboard in games and it's been a joy in both Elite Dangerous and MechWarrior 4. But I do think popularity has inflated the pricing of this range of products a bit too. I'm waiting for a good deal on the Flight Pack to give away my stick.
The ideal would have been the old Logitech Xtreme 3D joystick inputs/form factor with T16000M hal sensors but nobody, not even Thrustmaster, seems to be making anything that resembles that happy medium, it's either way cheap crap or way expensive shit (TM Warthog).
But if you really want to not be "limited' with things like a single instead of dual throttle maybe you want to be looking at flight yokes instead of flight sticks for sims like this (although I guess fighters will be added too eventually and smaller craft also may use sticks in real life also).