Thank you for the clarification on that, because it seemed the engineer was building forever, then i clicked the amplifier and the health told me 100/100... I thought, ok done. 
I will also watch the amplifier being build more closely in the next game.
I really would prefer for example, if I click a sector or a node that it shows me the income or if I click a metal extractor it tells me the income?
Also one different problem... it is the team colors... white/grey looks totally the same like neutral sectors, it is really hard to quickly see what you have conquered or not.