No we won't/be can't move back to old servers - they were way too inefficient and costly. The new setup is actually more performant, but required a few changes that caused some other issues - most of which should be resolve now (we actually did a few more improvements the past few days, that might resolve various issues you perhaps had)
I have seen people complaining about the armour upgrades not increasing armour since it is 0. I would like to clarify that it actually increases the health of the unit not the armour which does well to raise defence of your units.
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No we won't/be can't move back to old servers - they were way too inefficient and costly. The new setup is actually more performant, but required a few changes that caused some other issues - most of which should be resolve now (we actually did a few more improvements the past few days, that might resolve various issues you perhaps had)