in a vacuum? my happiness over yours 100% of the time, unless for some reason your being less happy then me can have some serious repercussions on my personal life, but given a single option in a vacuum and no other surrounding variables, i'll pick me over someone else.
also, by the unlogic (or Xunlogic, as it may be) the op uses, i guess paizo should be getting ready to close up shop on their 3.5 clone and bring out a 4th ed clone, since well, i didn't find pathfinder to be the cat's pajamas so i'm darn entitled to have them drop their game and fanbase and make one just for this little special snowflake right 'ere. right?
look, i can see getting angry about gamestuffs. you invest not just financially into it, but emotionally in the world, characters and stories you and your pals create. a major rule change does seem like it can threaten those things you hold dear since if you do buy into the change, characters and/or worlds might not work or exist as you know them. i was like that too a few years back.
i then decided to apply something i learned on the playground days to my TTRPG lifestyle: you know what make me happier then being angry about games i don't play? playing games that make me happy instead.
really my options in life can generally boil down to choosing between "will i be happy or not-happy with this thing?". so why choose the latter when the former is much more appealing?
and there is always the old adage of not fretting over things you can't control.
this is one of the reasons i left my 7-year group who kept on playing pathfinder, a system which i grew more and more irritated with, and told them to grab a player that would be more enthusiastic about the system since i know i can't get them to change systems. plus, i wouldn't want to impose that much selfishness on the group... i like these guys, they're a pretty cool bunch of nerds.
and it's not like i don't get to see them: i'll drop down on wednesdays and say hi on the rare occasion before their session begins then leave when it starts. all in all, i would say i'm a happier guy for it, i don't drag them down with my lack of energy AND i still get to see them.
plus, i get to use my wednesdays to play games i do like.
5th ed, in it's current form, doesn't seem to indicate it's going to be a game i care for. i can appreciate the ideology behind some of the stuff they're putting out, but more then a few concepts or the current application of the ideology i simply don't care for. so instead of complaining 'bout games i don't play (or plan on playing) and going in an eventual downward spiral of bad feels, i simply go "nope, not for me" and keep doing stuff i like.
i really don't care if WotC releases a version of D&D i don't care for. either they release something i like and i play it, or they release something i don't and i instead play something i like. my brand loyalty to D&D died quite a while ago, somewhere towards the end of 3rd ed's lifecycle before 4th came out.
when 4th was released, i only bought the supplements that had stuff i wanted in it or expected to use rather then anything with "DUNGEONS AND DRAGONS" splayed on the cover. again, this smart purchasing habits meant i had more money to spend on stuff that would make me happy as opposed to a book i probably would not use (like say, divine power, because i simply don't care for for those classes)
in the end, i've simply decided to leave myself open to be pleasantly surprised with 5th, but fully expect something i don't care for. this way i either get something new that makes me happy or i keep playing something that currently makes me happy and i have money to spend on other stuff that potentially makes me happy.
all in all, i guess i win regardless of your circumstances.