@Super-Spy
The HTC one battery should hold up very well over time due to it having a li-poly battery (doesn't age over time, at least not as quickly anyway) and not li-lion (ages over time), also HTC have disabled the qualcomm quick charge feature on the one in order to increase the life span and decrease the chances of it "wearing" out quicker (at least according to Brian [expert reviewer and knows everything there is about phones/hardware etc.)
Blink is easily solved, remove all the sources so that it won't refresh/update with new stuff and swipe to the right and you have your normal homescreens where you can customise it. Better yet install a 3rd party launcher like nova (which is far better than sense and touchwiz and any other OEM launcher imo) and blink is no longer an issue at all, it is only shown on sense launcher.
I haven't read about failing touch sensitivity on the one at all. People who have got their hands on both, have said that the one screen feels more sensitive, doubt it is worth worrying about though (having used HTC desire, one S etc. I can say that I have always found the touch sensitivity really good) Only issues that the majority of people seem to be having are the gaps [imo a small thing] at the top or/and bottom, buttons not responding all the time, I am pretty certain that these issues are just because of it being your standard first batch and will be fixed/improved with newer batches
Samsung are much better than what they were in the past for support/updates but IMO HTC is still better overall and have a better history with updates compared to Samsung and I think are going to be even better with the one as long as they keep to their word and don't release loads of devices, they might not get the updates out as quickly as Samsung for the flagship (they use to be quicker with their flagships though i.e. desire and 2.3 [not officially though] and sensation and ICS) but it isn't a HUGE difference in the time it takes for phones to get updates now (nexus devices still trash the OEM by like 6 months). Many articles etc. that have shown HTC to be better in this area i.e.
http://readwrite.com/2011/01/14/data-shows-what-manufacturers-and-carriers-delay-android-updates
http://www.techhive.com/article/256...es_do_the_best_job_with_android_updates_.html
http://arstechnica.com/gadgets/2012/12/the-checkered-slow-history-of-android-handset-updates/
Reason HTC didn't go with 4.2 is because it was full of bugs, especially battery drain and plus it would have caused more delays so they stuck with 4.1.2 as it was stable and they could get it sorted out quicker. Supposedly the one X and S will be getting 4.2.2 with sense V5 around June, so the one will/should get that update before then. IMO 4.2.2 is a very minor update and not worth worrying about.
Also, might be worth considering that Samsung have added a ton more stuff to touchwiz now and imo bloated it with a lot of unnecessary stuff and moved further from stock android so updates could take longer where as HTC have moved closer to stock android and sense is less bloated/more minimal than touchwiz now.
I wouldn't really worry too much about the support/update as am sure both devices will be supported extremely well and get the updates quickly enough.