Pine, have you noticed how we're seeing fewer and fewer well-qualified community members actively seeking out the responsibility of various committee roles? (I'll point out that this is particularly noticeable amongst women within the community.) It's because they are being bombarded, more and more, by unreasonable levels of criticism. I can say this with a fair bit of authority because I've been involved inhigh-profile committees, task forces, steering groups and responsible roles for 8 years, and the level of criticism has definitely affected where I'm willing to invest my volunteer efforts. I turn down 10 attempts to recruit me for various tasks for every one I accept, and I'm not alone.
The Wikimania Scholarship Committee does work that will never satisfy everyone, and all of their decisions will be found wanting by some segment of the community. It is a very difficult job - there are so many factors to weigh that, even though there are some basic minimal levels of activity expected, deciding between a candidate with a few thousand edits who is one of the most proliferate editors of a small wiki (e.g., the editor mainly translates high-value articles and posts them in a single edit) against one who specializes in high quality images (but only uploads 50 a year) against one who averages 15,000 edits but mainly works in anti-vandalism, against one who has few on-wiki contributions but has trained and educated dozens of very productive editors....well, you see the challenge. These are all valuable contributors - but their contribution to the movement is very different, and those who value some of those contributions over others will find personal justification in complaining about the decisions the committee makes.
There may be some reasonable arguments about providing some aggregate information such as the number of applicants from different regions and the percentage that were successful....but again, there are other routes to Wikimania including scholarships from large chapters, which often sponsor community members from other regions, and often select recipients from the pool of WMF-sponsored scholarship applicants.