I see we have about 15 XXしげ entries. Two (苛立たし気, 涼し気) include the XXし気 form but the rest don't. They all seem to get some hits, so it probably won't hurt to fill them in. I may be off the track, but it seems quite valid.

@@ -15,0 +15,3 @@
+<k_ele>
+<keb>哀し気</keb>
+</k_ele>

The addition to the above is less usual than the main entry, but it still picks up quite a few Google hits.

My main reason for suggesting this addition is this: it helps the searcher understand the use of "げ" as used in this position. You do have a separate entry for "げ[気]" showing its use as a qualifier to create "seeming" and that is helpful, providing one knows what to search for.

However, because you already have the above entry, it would not be a detriment to show that "げ" equals "気", moreover, it does exist as a used form. Sometimes, in other dictionaries it is the added on bit which causes the trouble for the novice because the dictionary composers seem to assume that the user knows either the reading of the added on kanji or the kanji when only a reading is given. Unlike many other dictionaries, your dictionary is very helpful in this respect. Your dictionary goes the little extra step to help the novice make sense of something which the expert takes for granted [no doubt forgetting where they themselves started from in the process of learning].

@@ -11,0 +11,3 @@
+</k_ele>
+<k_ele>
+<keb>悲し気</keb>

nikk, prog

->base form

@@ -5,1 +5,1 @@
-<keb>悲しげに</keb>
+<keb>悲しげ</keb>
@@ -10,1 +10,1 @@
-<keb>哀しげに</keb>
+<keb>哀しげ</keb>
@@ -13,1 +13,1 @@
-<reb>かなしげに</reb>
+<reb>かなしげ</reb>
@@ -18,3 +18,3 @@
-<pos>&adv;</pos>
-<gloss>with a sad look</gloss>
-<gloss>sadly</gloss>
+<pos>&adj-na;</pos>
+<pos>&n;</pos>
+<gloss>seeming sad</gloss>