Flash should clearly publish its policy concerning rooting of the Flash Plus 2 device. Prior to purchase, I followed a link from Lazada to the Flash website. Nothing there at the time mentioned anything about deliberate mechanisms in the product to frustrate rooting attempts. I only learned about the existence of this community forum from the invitation card pasted onto the packaging box. Else I would have reviewed all customer comments, especially about rooting and availability of stock ROM images. And expected forthright disclosure of the Flash policy you refer to, as well. Then, I would have carefully considered my decision on whether to proceed on with my purchase.
Flash is taking unfair advantage of the inadequate consumer protection laws in SE Asia region. If I bought such a crippled device in an advanced economy, I would return it for my money back, in a flash.
By going out of its way to prevent rooting and use of alternate ROMs, the Flash Plus 2 will be least supported by devs of root apps and alternate ROMs, even if I manage to root it eventually.
I have now learned my lesson not to trust any China-brand phones manufacturer with no track record of customer satisfaction.
Of course patience is now necessary. To research viable successful rooting methods which don't call home or require EXE file on PC. To forgo system software updates which fix product bugs lest they silently/aggressively foreclose any loopholes to rooting. To forgo security updates so newly discovered exploits can be retained for rooting successfully.
Ideally, I would prefer a more bug-fixed stock ROM with more Google security updates, before forking off the system software by rooting. Thanks to the Flash unstated policy, I'll eventually have a rooted device with more early product bugs and more security vulnerabilities. And this device will still bear the Flash brand for all to see.