kmogon

Their experience required to level up is nearly the same as in case of other economy structures. Like most other resource structures, Caravans resource production also depends on terrain viability ( if they are not too close to other economy buildings ). They also have production debuff when being too close to your structures overall, so make sure to position them well. 

Hi !
I understand your concern comming from the current situation with stationary buffs/defences, but I can assure you that situation with Lorien's new Talans is different. Its gameplay revolves around improving buildings with various upgrades, which all cost money and time to be researched. It means that Lorien player needs constant source of income and tries to boost it as much as possible. Combining it with Talan's increased cost, and further investment to have all those upgrades ( Talan with border fance and niphredil upgrade costs 1300 resources while being as vulnerable as other towers ), means that it would be highly inefficient on Lorien player's side to spam their defences on one side instead of spreading them around his base for additional eco and protection.
As for general situation with stationary defences and buffs, we took care of them long time ago, as they has been nerfed appropiately - all towers have the same stats and cost ( normalized to values of weaker ones ). Statues have decreased radius and bonus value, and wells cost more. We are trying decrease their value, as it is quite high in 7.3.1, but still keep them usefull.

Nazgul are perfect heroes currently and ideal cavalry force. They indeed need more micro to be used well, but they are very effective and posses tools that disrupt enemy forces. Their price is fine especially that mordor have pretty good early game units for their price.
The army composition is the key here and you cannot expect a win by just spamming basic orcs. Archers are always your main source of damage and can be very deadly when in groups, also making it harder for cav to properly counter them.
As for expensive locks, they are part of mordor gameplay, justified by low cost of your meantshield units

I'm seeing from your posts that you are overestimating strength of buffs in this game. Many other heroes have comparable temporary buffs to Elrond's like Dain or Bolg for example. Important point here is that buffing hero alone isn't worth as much since it relies heavly on units surrounding it. That's why most expensive heroes are primarly damagers with big aoe attacks and Elrond's big buff is there to help him justify his price, since as fighter he isn't that good.
This is also his single power while other heroes, especially for his price, have much more to offer. Even mentioned Dain can boost his troops and debuff enemies by greater amount.
Similarly in case of Aragorn, he isn't great archer hero - he has lower range and damage than other range heroes for his price and thus he is primarly being used as fighter among community, for what he is priced well imo.
As to rest of the point, we adjusted some of that stuff already.

Most of those points I hear and see first time about. Boromir is decent hero but was never called op by anyone, pro players included and I don't see why he with Faramir would create such game breaking combo. Elessar as well while he is game changing , he should be considering he is tier 4 spell after all. He still can be taken down, for example by other tier 4 spells or even tier 3 ones, so he is definitely counterable. Rest of those points we are actively looking at.