I think that we should have the 4lands explored to have the tier 5 since every time that we have unlocked a reward at the land exploration thing we get a new tier at low lands why should high lands be different and the cost should be 4.5 billion because that is the cost of the land and at the lowlands the 25th land cost 3 bil and the t4 builds cost 3 bil to build
One thing concerning devs is ally price inflation. They need to drain cash from game hence T5.... T6.....T7.... Can make a lot speculating these days by buying allies. Devs changed rules on gold transfer to try to prevent this route to developing weaker clan members and alts.
Also i notice that nobody seems to consider that the req for t5 could possibly be anything from 50 lands to 5bc resets. Or perhaps any similar achievements. Could be anything :0
T5 they just make it harder and harder to get anywhere. It's turning it a life time effort of taping buttons. No T5 will make people strive to get the items. With T5 and the people that have the items can still build the T5 how does this even out ps it doesn't.