We will capture this feedback so that we can get back to it. It is very helpful. Thanks.
In terms of the verb and the version, you can either select them from the dropdown, type or use dynamic values. The URL and all other input fields, certainly support dynamic values, which can be selected from the dropdown or autocompleted by typing the value text. We have wider support for transforms which can be nested like Paw and we do have variables, which can also be nested. You can build very complex dynamic expressions (http://bit.ly/2gz3OXO). These two features alone superset Paw on the same feature set.
We don't have builtin OAuth support but we are working on it. We don't have collections but you can save in projects (so files and folders).
The tool works in the browser by leveraging a minimal browser extension. There is currently work in progress to build it on top of Electron as a desktop app but it can be done in WebKit as well on Mac. We have not decided yet.
I genuinely believe this tool will improve your workflow once we add OAuth support and collections hence why I mentioned it here. And we do have a favourable licensing model which allows you to use the tool free of charge. This tool also works really well with all our other tools which allow you to fuzz, run security scans, and perform request inspection inside your browser without the need to install a proxy. You can even monitor iPhone HTTP traffic without too much fiddling (http://bit.ly/2h5nwex) and all of these features will be part of the desktop app.