My humble opinions.
Surrender; OK to the player who hammers you but only when you are truly done for (riot problems).
Make any (hopefully there will be none) early abandoned empires free game, but make it illegal to ask them for surrender.
Religious; I really don't care one way or the other. Just wanted to make a point of no *****ing (sorry Tesco

) by those brave souls that didn't take it. If we use a no Talisman mod, I may spend the 1500 points just for the Nature Shrine anyway.
I do like the no Training option (ban Advanced Mil. Science) but then we have to ban (or mod) Psychic too.
Turtling is for cowards. The Horde will always keep a door (or two) open. Beer and Pretzels for everyone.
(BTW: Beer is a class of Baseships, Pretzels are Dreads

)
Don't like Spoo's idea of "view all scores" at all, but I would not have a problem with leaving the Position or even the Score viewable on PBW. Getting info about the other guys empires is half the fun.
And absolutely no "all systems can be seen by all players".