Warburton worked with Douglas, now at Ipswich Town, at Championship club Brentford.
“I know Jonathan Douglas, who played under Warburton at Brentford, and really enjoyed working with him,” former Rangers attacking midfielder Miller told The Scottish Sun.
“He told me he once said to him, ‘Gaffer, we really need a Plan B when things aren’t working out’.
"But Warburton said to him, ‘Why do we need a Plan B? We just need to execute Plan A a lot better’.
“That sums up his approach to the game and I don’t expect Rangers to suddenly become defensive next season.”
Should Rangers fans be worried about the aforementioned reported Warburton comments?
There can be no denial that Warburton has done a brilliant job at Rangers, who won the Scottish Championship title with ease this past season.
The Gers played good and entertaining football, and their attacking mindset gave joy to the Ibrox faithful.
However, Rangers also conceded more goals than they should have, and this could be a problem for the Glasgow giants in the Scottish Premiership.
The Gers will be aiming to compete for the Scottish Premiership title with Old Firm rivals Celtic next season.
For a successful 2016-17 league campaign, the Gers need to tighten up in defence, and that means adapting their gameplan and playing defensive football when needed.
The signing of former Newcastle United and Queens Park Rangers midfielder Joey Barton is going to help, but overall Warburton’s approach needs to be more adaptable, and the Rangers manager has to be flexible with his ideas and footballing style.