せめてもの	193054
せめても	199351

Looks good. I suggest we keep せめてもの and align it with sense 2 (those n-gram counts are instructive.)

@@ -16,0 +17 @@
+<xref type="see" seq="2610770">せめてもの</xref>

gg5, prog, daij

OK.
It's an adverb in the kokugos. No need for exp.
せめて is an awkward one to translate because it can mean "at least" or "at most" depending on whether the thing/quantity/action/etc. is better or worse than the ideal.
せめて2000円なら買うのだが - 2000 yen is the most I'm willing to pay.
せめて2000円なら売るのだが - I would take 2000 yen, at the very least.
I don't know if we want to keep the せめてもの entry (or just have an adj-no sense here) but I propose these glosses.

@@ -8,2 +8 @@
-<pos>&exp;</pos>
-<pos>&adj-no;</pos>
+<pos>&adv;</pos>
@@ -12,2 +11,11 @@
-<gloss>bare minimum</gloss>
-<gloss>the least one can do</gloss>
+<gloss>at the very most</gloss>
+<gloss>as a bare minimum</gloss>
+<gloss>(even if it's) just</gloss>
+</sense>
+<sense>
+<pos>&adj-no;</pos>
+<gloss>minimum</gloss>
+<gloss>(very) least</gloss>
+<gloss>at least some (comfort, etc.)</gloss>
+<gloss>only (consolation, saving grace, etc.)</gloss>
+<gloss>sole</gloss>

I agree with Rene and the previous anonymous contributor. It's not exclusively せめてもの - I saw 2 せめても without the の among the 10 or so 
most recent tweets containing the phrase. It should prob have an adv tag/sense too.

we might want to keep せめても as adj-no and toss せめてもの.  but it's probably harmless to have both... daijr has both

Not always:
「私は、タオと言います。
ヤンの父がわりをしております。
・・・あれは、まだヤンが生まれて
すぐの、私が旅の道具屋をしていたころでした。
私が、闇の魔物に襲われたその時
ヤンの父が助けてくれたのです・・・
・・・ヤンの父は私のかわりに・・・
せめてもと思い、ヤン母子の世話を
しているんですが・・・」