No, I don't think they should have created a second question. Hence my not suggesting that they do so.
They asked a question about dragging their group "kicking and screaming" into 5e, and wanted to know how to make an invoker. You challenged the frame, telling them not to do either. At the time, this was an excellent thing to do. The usual risk with a frame-challenge response like this is that they often don't answer the question (as in this case, "don't" isn't an answer, whilst others are answering how to make an invoker).
The other risk is that when the problem a frame-challenge addresses is undermined, the frame-challenge is also undermined. In this case, that problem you were addressing got undermined completely. Worth noting the comments:
"If your group is happy with 4e" That's the thing; they're not particularly happy with it. "Kicking and screaming" was just a bit of hyperbole. I'm not looking for a direct translation, but more just a way to have the same sort of flavor. I'll see if I can add some clarity to my question. – Wrathchild 14 hours ago
@Wrathchild Even that being the case, you are far better off finishing the campaign, retiring the characters, and starting over with fresh characters. – KRyan 14 hours ago
Possibly. Probably, even, if this was most people think of as a campaign. But it really rather isn't. It's barely a sandbox/adventure-of-the-week kind o' deal. – Wrathchild 11 hours ago
In revision 4, the author undermined the original "kicking and screaming" issue totally, asserting the exact opposite: their group is actually cheering and fist-pumping for the new edition.
At that point it's pretty clear they're providing hyperbole one way or another, and are uninterested in being straightforward with us on that point. They want the invoker one way or another and will mislead us (deliberately or accidentally) to whatever ends has us just give them an invoker conversion. If they're willing to provide unreliable background information like this, we're better off scrapping it and just dealing with the question they're trying to get answered, so I suggested removing the unreliable background info altogether.
(For the record, although it's possible, I am not attributing this to manipulativeness or malintent, so much as some less than careful use of language for which the impact was not foreseen.)
As for the impact of actually requesting them to ask a second question, the result would be that they created this...
- How do I make a 4e invoker in 5e?
... followed shortly by ...
- How do I make a 4e invoker in 5e, pt 2: No seriously, how do I make an invoker in 5e?
Experience tells me this would be met by the second being closed as a duplicate, followed by the community investing very critical inspection into the handling of the first question. "How did we mishandle it such that they had to ask two questions to get the first one answered?" would be a pertinent question. (My guess is this would be followed by handling of the question and answers to get them collectively focused just on the invoker conversion.)
The original version of the question introduced unhelpful hyperbole which is wasting a bunch of time on behalf of several people that never would have been wasted were it not included. It has been cleansed. The nonexistent problem which never should have been invented has been removed. The person didn't need convincing otherwise. This has been very disruptive and the question started off entirely derailed from the moment of its inception, and is now hobbling its way back onto the rails.
I hope it doesn't need to be said, but in case it does: this was nothing personal targeted at you in any way. We are just in the position of dealing with the wrong end of a mess that could've been avoided.