A suggestion/request: how difficult would it be to add a setting to allow us to opt to read manga at a lower quality than the original upload size? I know many for-profit scam reader sites (e.g., MangaFox, KissManga, etc.) do this despite the wishes of the scanlators or users, but this might help with bandwidth and be acceptable to many people like myself who aren't particularly picky about reading at full-quality. Even something as simple as 3 levels (low - for mobile, high - for desktop, original - for purists) would be useful.
Given the computational difficulty of downscaling all uploaded chapters server-side, maybe this could be supported by allowing willing scanlators or community members to upload multiple versions of their chapters at the various quality levels, with image quality metric and/or file size checks implemented to run (client-side in the browser?) prior to upload. The admins and community could work out the quality levels to support and the requirements for each, and propose best-practice downscaling algorithms and settings for uploaders to use.
I don't know how well this would be received by the scanlating community, but I would hope that making it an option instead of the default would prevent the usual outrage and allow users like me to contribute to reducing the bandwidth burden.