For those who have not yet seen it, there is a multiple account launcher in beta at https://forums.eveonline.com/default.aspx?g=posts&t=449738&_ga=1.174225634.1175545162.1444213707
Whether you are an alt-a-lot for various forms of industry, or merely someone who loves to set logoff traps on a bazillion pilots, I find this launcher a wonderful improvement.
If you want to play with singularity (the test server), that is also a bonus, and available as a pull down optoin.
There are some caveats, and it is worth reading the known issues/ frequent requests faq on the post.
You will need to re setup your client settings though apparently for those that come later there are plans for an export/import option. As with all plans, a google search for soon (tm) might be illuminating, though I am quietly optimistic.
I also don't entirely understand how to drive the different 'settings' per account, but seem to be working fine.
For anyone with 2 or more accounts, or if you want to play with singularity, I recommend the new launcher.