Williams technical chief Pat Symonds thinks the planned rules revolution for 2017 "feel a little bit rushed" and should be pushed back another season.
Early last year the FIA proposed a radical shake-up in the regulations in order to produce faster, better-looking cars and more entertaining races to counter falling TV audiences and complaints about the new turbo formula. However, recent discussions appear to have centered around less severe changes to aerodynamics.
"Will we produce a good car? I don't know," Symonds said. "I think we've still got work to do on it. I do feel a little bit rushed, a little bit pressured.
"I think that personally we're trying to move a little bit too quickly without establishing the basic principles to work from. I'd be much happier if things moved on to 2018 rather than '17 for new rules, and we spent a year really researching what's needed. But that's probably a cry in the wilderness."
Symonds has been a key part in the discussions since the beginning and has previously voiced his concerns the changes could result in less overtaking. The 2017 rules need to be fully defined by March 1 of this year -- a day before the second winter test in Barcelona -- but Symonds thinks more time is needed.
""There are two technical regulation meetings yet to take place. One at the end of this month, one in February, before the 2017 rules are established by the beginning of March. So yes, we are getting into some of the details rather than the fundamentals.
"Are they right, are they wrong? I think that's not what the Strategy Group are talking about right now. The Strategy Group gave a mandate as to what the cars should be like for 2017, and we've been working on it. I think now the Strategy Group are moving on, and they are looking at the sporting aspects rather than the technical aspects."