Your comments

Vertabelo supports physical database modeling only. In order to make many-to-many relationship, you need to add a junction table.
I would expect it to appear on production in December. We're convinced we should support this, but it isn't a critical feature and thus the estimated time moved towards the end of the year.
Does your question relate to this one:  http://support.vertabelo.com/topic/492700-managing-a-data-dictionary/ ? If so, it is planned to be done soon.
If it's about automatic FK column removal after reference deletion - I agree. We have this on our TODO list and it will be done in the nearest future, maybe even in the next week!
Not updating the type of FK column is a desired behaviour. This is because you can have, for instance, "SERIAL" datatype for your PK and "INT" type for FK and this is perfectly valid structure (I'm talking about PostgreSQL now, but such cases exist in other RDBMSs as well).
If you change the PK type and the types of PK and FK don't match, you should get an error in the "Problems" section.
Well, that's caused by form autocomplete in your browser. It doesn't change the behaviour of login form, but I agree that it doesn't look user-friendly. We'll take a look at this. Thanks for reporting.
Thanks for the feature request.

While there's a possibility to format/rearrange selected tables using "Size", "Align" and "Distribution" options from the toolbar, auto-formatting doesn't seem to be that much needed improvement. I'll leave the topic open for any further discussion.
Do you mean the same as described in this topic? If so, please vote up there and we'll close this question. If not, please write a little more about what you'd expect it to work.
We're not saying "no" for touch devices. We also see some advantages in accessing DB modeler from a mobile dev. They just aren't that high on our priorities list. As I wrote in my previous comment, some moves towards mobiles may happen somewhere closer 2015, but we won't forget about this.