Sorry for too late...
Actually I'm still busy these times, so these are some quick thoughts on improving this map... maybe?
RC's 7Key SC:
Actually when I first saw this, I think this one has too many random things...
Many inconsistency lies in the map, such as:
(1)00:10:685 (10685|1,10841|3,10841|5,10997|4,10997|1,11153|0,11153|6,11153|5,11310|1,11310|2,11310|4,11466|6,11466|0,11466|3,11622|2,11622|5,11622|1,11778|6,11778|0) - I believe there are some sliders representing guitar melodies missing?
(2)00:25:528 (25528|2,25685|5,25997|6,26075|1) - ^
(3)00:48:185 (48185|5,48653|4) - One sentence vocal mapping ( I believe you didn't map vocals in early and later parts, or I didn't get what these notes represents...)
(4)01:05:841 (65841|2,65997|1,66153|4,66153|3,66310|2,66466|2,66622|4,66778|1,66778|3,66935|4) - Some vocal notes missing? I heard しんじで - something at least 3 charaters assuming しん is one part. I recommend mapping 4 notes like in the earlier part, because it's pitch is something like CDCD.
(5)01:15:841 (75841|2,75841|6,75997|3,76153|5,76153|2,76466|4,76466|2,76622|6,76778|5,76778|3,76935|2) - ^ Similar like this.
Some other suggestions:
00:40:138 (40138|2,40216|3,40294|4,40372|0,40450|1,40528|2,40606|3,40685|0,40685|4) - I suggest not placing them as stairs: It looks like these notes are representing drums without concept of pitch relevancy. With a random hit (34251635...) Maybe you can show the transition of the music? (1 more in later parts)
Since there are no one who already modded SC, you may ask more people for modding this diff? Maybe other people would have different thoughts.
7K MX:
00:08:185 (8185|1,9278|6) - If you know what you are doing, ignore this. If not, it looks like there are an intended gap representing that they are 2 different sound. (too many more case later)00:15:060 (15060|3,15216|3) - I suggest moving to the 1st column starting from the left or changing the patterns. I believe you didn't intended to do so like what I see now (A tiny jackhammer, and maybe a nightmare (3 hold + 4 hits)to left space players)
00:16:310 (16310|4,16935|3,17560|2) - ? Actually I suggest stacking them XD
00:42:403 (42403|5) - Move to 3? It seems it should not be intended jackhammer.
00:43:966 (43966|4,44122|4) - Maybe you are intended. If so, ignore this one and the former one. BTW, I assume you are showing these notes as either guitar hits or drum hits, but it seems for 8 1/4s guitar hits are always at the same pitch velocity... Or you are mapping drums. But if they are drum hits you have missed some notes... Overall this is not so natural
00:45:528 (45528|1) - Place to 7 to avoid an unintended "hit-just-before-slider".
00:50:138 (50138|2,50294|4) - It looks like there are no sound at all? it follows something like o_o_ooooo.
00:53:966 (53966|4,54044|5,54122|4,54200|5,54278|4) - If this is intended, ignore it. If not, I suggest making it a 2-hand balanced style and rearrange this part.
01:00:841 (60841|3,60997|2,61075|1,61153|0,61231|2,61310|3,61388|4,61466|6,61466|5) - ?! This is pure overmapping.
01:01:935 (61935|0,61935|3,61935|6,61935|1,62560|2,62560|5,62560|4) - ^ ?! Yeah this one too.
01:05:138 (65138|3,65294|1) - ?! ^
01:07:638 (67638|3,67794|1,67950|3,68106|1) - ?! ^
01:11:310 (71310|6,71388|5,71466|4,71544|5) - ? Something like vocal, but it doesn't seems that such many notes are needed...
01:15:138 (75138|1,75294|3) - ?! ^ I give up figuring out all of them.
The first half of the song seems only with some slight problem, but you did too much on the later part. Like others said I believe this one is overmapped...
You should consider only map something that is hearable?
Hope these are helpful