00:12:914 (1,2,1,2,1) - not really a big fan of spamming ncs in lower diffs, this might cause unnecessary reading burdens to players of this level.
00:19:214 - Would suggest not ignoring this loud drumbeat. Rhythm arrangement like this would be a wiser choice https://angelsnow233.s-ul.eu/mqMpzuEh
00:45:764 (1,1,1) - this being all circles feels bad for the spread considering all the higher diffs use sliders for the unusual rhythm transition (which is easier due to the leniency in slider acc) so to make it right you could make 00:45:764 (1,1,1) - into a reverse slider or do something simillar to higher diffs
also 00:48:014 (3,4,5,1) - you mapped this with sliders but then both 00:48:364 - and 00:48:764 - are passive which feels rly awkward due to inconsistency in the rhythms so i'd advise to pick one version and stick with it (pref the one i suggested in the main post)
00:53:114 (1,2,3) - what about adding a baby jump for the song intensity? http://puu.sh/IJjGX/646ede7662.jpg