</lurk>
Using game theory(!), we can deduce:
1. Analyzing the pay off matrix suggests that assaying is a losing strategy. You spend time assaying that could have been better spent developing land, hunting the wampus or even gambling, while sharing the fruits of you labour with the competition.
2. Tragedy of the commons: if everyone plays a winning strategy (i.e. by not assaying), everybody loses in that it becomes difficult to optimize your crystite strategy.
To Assay....or Not to Assay....That is the question...
[...]
As it is now, it is a part of your strategy - do you assay for highs and try to build around them - hoping the other do not steal the mediums or high itself?
The pay off matrix clearly suggests that you're a loser if you assay and a winner if you leach off everybody else' assaying, hence assaying
unfortunately is a part of everyone's strategy. The question is only whether you play it optimally (don't assay, but leach) or not (squander your time assaying and inform everyone of where the goddies are stored).
Do you not assay and just try to keep your plots together for production bonus?
The question can never really be answered because each player reagrds the question differently
Even though you don't go after getting the high crystite plots, you would still pick a possible high or medium over a possible low or none when trying to maximize EOS. So, assaying would still be of value to you.
The results are now visible to all, so it does create competion for plots and this IS and WAS part of the fun of the original version (and punching your opponent when he stole your plot)

Even though everyone would have to assay for themselves, there would still be competition for the best plots. But there would be asymmetric information, benefiting those who make informed decisions after assaying. Also, by making assaying hidden, you would force all players to make more tactical decisions during development - which is good. Assay, develop, hunt or gamble? If assaying, then which plot(s) to assay? Etc.
IMHO: today's assaying scheme can only be played optimally by not assaying. The only ones who don't understand that are newbies. The old-timers are therefore leaching off the newbies using a bad function of the game.
<lurk>