That's true , some of those gripes are being waited for some time by many users and people that collaborate with Nintex features.
Nintex has open arms to receive those complaints in many ways. for example:
-Customer Feedback for Nintex
-This Community site
-Beta testing programs
-Excellent support
-Partners
I have been part of almost all of them and I have been surprised the way that those "ways" works.
I suggest you to visit Customer Feedback for Nintex , because you can add your desired features/issues there and other people can vote your posts/ideas and also you can see your post status. Many current features of Nintex products come directly from the proposals of users and collaborators.
This community site and the users/collaborators also dedicate time to solve/suggest/collaborate current issues, so you can post specific questions and many of us can help you on a solution or workaround and some of us also could tell you if your proposals are on the products roadmap.
Nintex Support is another great alternative to solve issues because they will dedicate quality time for customers that use the products.
Some of your gripes, can be found on the user voice site and you can add votes to them.
1- Passwords >>> WebRequest Action want option to retrieve credentials from secure store – Customer Feedback for Nintex
2- Debugging >>> It is not proposed, so you can be the first one.
3- Initial Email >>> I remember that I have seen some posts about this subject. Here is an external post >>> Nintex workflow for Office 365-Start a task process not delivering email to ‘Assigned to’ user – Office 365 Cloud Produc… I also suggest you to write to support@nintex.com . They will attend your specific case.
4- Lazy apprval >>> It is not proposed, so you can be the first one to add it to www.nintex.uservoice.com
You aren't alone in your gripes.
Your best bet is to vote in UserVoice - not only vote, but, also comment with your use-case scenarios - and, collect links to posts you find where users in the community mirror your request.
The Nintex team have proven they're on a mission to get these things done for us. They've pushed out so much in the last little while - we finally have scheduled workflows and action sets - that it is imminent that we get the other items we need.
I've seen a lot of folks remark on the aesthetic differences between the products, which explains the icon design - it's an easy thing to get knocked out of the park, so it makes sense we saw that sooner. I would also expect to see action renaming in the UI for the same reasons.