Personally, I don't feel I know enough to be messing with mech mods and sub ohms. I love the various protections offered in eGos and can't wait for my new iTaste V3 and 2 new drippers to arrive. I drip and rebuild Kangers for protanks and build single coil cotton set ups in rdas and use a meter -- beyond that, it all just takes away from the enjoyment of the moment for me. I love those chipsets and have no desire to know how they work beyond pressing a few buttons. Gimme the safety features. I'm old and lazy.
It sounds like you already have most of the knowledge necessary, as well as the right mindset, for mechanical mods and subohm vaping. Just a little bit of learning Ohm's Law and being able to calculate the current (amps) that a certain resistance coil requires and verifying that you aren't pulling more current than what the battery is rated for.
And there is nothing that says you have to go ultra low resistance with a mechanical mod. I've found my "sweet spot" with mechanical mods is a 1.0 - 1.2 ohm microcoil with 28 gauge Kanthal.
Amps = Voltage / Resistance in ohms
So with a fully charged battery at 4.2 volts, a 1 ohm coil will pull 4.2 amps.
I've been down as low as 0.4 ohms, which would be 4.2 volts / 0.4 ohms = 10.5 amps.
Both are well within what my Sony 18650 VTC3's can safely handle -- 30 amps continuous.
Not that difficult, right?
Of course if you don't feel comfortable with an unregulated mod then you shouldn't use one. All I am saying is that it is not very difficult for someone already with experience building and measuring coils, and who has the proper mindset with regards to safety, to be able to work with an unregulated mod.