There are more mountains in Gondor than playable landscape. As others have said, Gondor does not seem a kingdom at all. A revamp of Gondor is needed. If not, the devs could settle the score with fully fledged new gondorian regions.
I'd love to see those areas made playable. Lower the impassables in a few select locations, throw in a few points of interest, and throw in some of the old-school, non-vectored quests that you find by exploration, like the ones they tucked into Mitheithel.
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