Warnock said his side had played the better football at Ashton Gate without getting the rewards.
He guided the Glovers through two promotions before leaving for Ashton Gate in September 2005.
Bristol City has previously said the Ashton Gate site is too small to fit its plans.
City are about to head to Portugal for a training camp buoyed by four new signings at Ashton Gate.
Danny Haynes and Nicky Maynard scored the first-half goals for Bristol City at Ashton Gate to secure victory.
The Brazilian shot-stopper has become a cult hero at Ashton Gate, keeping 15 clean sheets so far this season.
Almost 11, 000 fans turned out at Ashton Gate as City gave debuts to five out of their six new signings.
He said he also supported the club's desire added for a new Ashton Gate railway station to coincide with the development.
Whereas Stoke's success has brokered a a fragile alliance between Pulis and the club's fans, Johnson is extremely popular at Ashton Gate.
The Glovers have also had talks with ex-Bristol City and Swansea striker Lee Trundle, who was not offered new terms at Ashton Gate.
This was to reassess the freezing conditions but thankfully Ashton Gate was standing up well to the elements and the game restarted on time.
Foxes manager Nigel Pearson was rewarded for making four changes from the side that lost 3-1 at Ashton Gate, including recalling Howard and Fryatt.
He added that it was hoped there would be a planning decision on the Ashton Gate plans by September, before the Ashton Vale inquiry continues.
The Robins went into the game with a 2-1 lead from the first leg, and the home supporters at Ashton Gate got fully behind their team.
But after a trial with the Robins he is now set to be offered a deal to stay at Ashton Gate to the end of the season.
Utility player Rosenior came through the ranks at Ashton Gate and was a regular member of the side who just failed to achieve promotion to Division One last season.
BBC: SPORT | Football | My Club | Bristol City | Robins accept Rosenior pay-off
But managing director Jon Lansdown said demolishing the Hirerite site next to Ashton Gate and getting rid of the temporary huts alongside the Williams stand would free up more space.
"If it doesn't happen then I'll do what I've done every year, I'll just get on with it, that's my job, " Jones said, after watching his side's stunning victory at Ashton Gate.
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