'Metagame thinking'? Ok. All this is IMHO.
We have 9 different variants: tech victory is on/off, comp tech victory is on/off, and player winning/equal/losing (in econ, tech etc. prior to end of the game)
First number - 'comp Tech victory always on' score, second number - 'allow comp Tech victory choice' score
player on/comp on/player winning - all is ok, player wins.
player on/comp on/draw - for me, if i lose, i just reload 1-2 years before and change my strat somethat and win. For others, it will be fun to go to tech race to victory. (+1, 0)
player on/comp on/player losing - Player spend so many hour playing this game and lose. This is bad because the there will be no hope to win then your econ is bad, so players just restart a hopeless game (so less fun) or use cheese tactics to get techs etc. (-1, +1)
player on/comp off/player winning - all is ok, player wins.
player on/comp off/draw - bad because player just can press 'end turn' several times and win - no sense of competition (+1, -1)
player on/comp on/player losing - as already said, player must be rewarded for win in unfavorable conditions, why it must lose because of worse economy? (-1, +1)
player off/comp off/player winning - depends on other victory options on/off. More important here is why player turned off Tech victory. If it turned it off to disable 'sudden death' then comp researchs last tech, this is bad, because he is now forced to win other ways. (-1, +1)
player off/comp off/draw - bad because it will take too much time to win in other ways, same as player on/comp on/player losing. (-1, 0)
player on/comp on/player losing - same as player on/comp on/player losing (-1,+1)
'comp Tech victory always on' -3
'allow comp Tech victory choice' +3
Overall, 'comp Tech victory always on' is good then there is a draw, and players playing for fun will get good sense of competition. It's bad because it don't give a chance to players to win a game anyway, gives sense of hopeless, so reducing fun.
'allow comp Tech victory choice' is good because it can remove abovementioned drawbacks, but is bad mostly because it favors metagame thinking. Some players think that it's *unfair* to play with this setting because they had an *unfair* advantage over comp, and this reduce fun for them because they are forcing themselves for abovementioned drawbacks.
~SDC~