Well I think since we are using django anyway (and bottle on the API side) I'm not sure why we would use flask forms for this..
Anyway the main question is probably, is it worth to try to define a DSL or not? The problem I see is that we have a lot and very complex requirements, trying to define a DSL that is able to represent everything might be a massive pain. I prefer to do something smart with metaclasses and just use Python as the configuration language itself, using metaclasses and similar nice things to define the language used.. The only annoying part is the persistance, I don't like too much the idea to store Python code in the db for example, but maybe it's fine, many projects configure things with Python anyway..
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