I personally wouldn't want it any bigger or heavier. Portability for me is the size and feel of the unit - any bigger and it just wouldn't be portable.
Long term i reckon you will change your mind, what if your driving on your own 4 hours.... pulling over , man i stick to what i said above
also if your out all the time and nowhere to charge it, or if your out a lot compared to in at home a lot like me, tinymight get a pin head use in comparison to my splinter, therefore £230 vs the Splinter £70 + £35 for a twin battery 21700 mod for me and what i need for it's splinter allday, but it is better valued vs the Tetra p80 whereby it thrashes that being half the price, just recently made my mind up no weed vape should exist unless it's a 510 screw in, when you need an update you buy just the heater, i truely think people being in love with these things pushes prices up they are not hard to make it's hardly nasa tech, when it's really being stoned and not smoking its what you like
Improving on the splinter is the one, that has same issue as tetra p80 i think whereby mouthpiece comes out to easily if out and smashes on floor, is why i bought the tinymight, but it's for much less frequent users i feel , 1 new battery with me lasts not much more than 1 hour, say i was out for 12 hours without a plug socket lol