As a member who just started paying as of today and someone who has been reading manga since below American Shonen Jump even existed, I have a few constructive criticisms of the site I think would be vital to win over more readers to Shonen Jump Alpha.
Firstly, I understand the administrators of this website really don't control policies like censoring, release schedules, and so on and those are a separate issue. However the format of Shonen Jump Alpha and this website in general is extremely frustrating to navigate. Some things that could help:
A.) Allow instant access to any series from the list in the table of contents. It's annoying having to memorize the page number and move the curser to that page should I want to read a chapter.
B.) Have auto-adjuster for double page spreads or images. Many (like myself) prefer to view only 1 manga page per internet page, yet seeing half of what's going on if the page is a double spread is certainly annoying. Simply adjust the page viewer so that a double page translates into 1 internet page. Every online manga reader so far has done this format and it's extremely simple, and makes for a much more pleasurable viewing experience.
C.) Please I can not stress enough to try and include every series that is in the Japanese Weekly Shonen Jump, it is not fair to readers. Hunter x Hutner especially is a must.
I Hope these comments are read, and hope they help. A far simpler but efficient manga viewer is needed.