Easier in some ways, harder in others... But overall preferred, Shinrei thinks - they have a lot of powerful individuals themselves, and they'd rather be able to have the vast majority of shinobi on evacuation in the case of a city-scale threat.
It does mean some of the international balance of power they use in threatened wars is disrupted - usually, they'd be able to count on their enemy's awareness that the other countries would pounce on their unprotected flank if they came out in force... Though... If the maintainer of the storms leaves, especially if both their apparent powerful shinobi come to Kiri...
Well. Konoha's been made aware of the issue, and the jinchuuriki networks means Konoha could be instantly updated if Ame's guardians move, and Tobi is very sure Konoha is at least motivated to get a spy in, even if the Hokage is disinclined towards invasion. (They're also discussing more direct help - the Hokage doesn't want to preemptively peel away Konoha's defenders, of course, but after some tense negotiations both villages have settled on a mutual defense agreement against the Akatsuki, and Konoha is quietly recalling the Hokage's brother to their village.)
(Kiri has also been identifying other targets within their borders, of course. Their village isn't the only place the Akatsuki might strike.)