They should all have a look at Tayler Adams, Eastwood's 10.
I believe Hegarty should remain at flyhalf for the 2020 season.
He has been consistent, is a good kicker, varies his play, and overall is Mr Reliable.
But more importantly, he should be the bearer to the future flyhalf for the Reds, and with time, for Australia.
I'm talking about Isaac Lucas.
He has the X factor that a flyhalf needs to have, but it will take him time to develop his skills.
So for 2020 put Lucas on the pine for both Hegarty at flyhalf and Stewart at fullback .
Gradually give him more playing time; allow him to get used to McDermott, a half with x-factor skills as well.
As a halves combination, this pair could be an outstanding pair for the future of both the Reds & the Wallabies..
Just don't rush them.
As for Lucas's size, many of the world's most talented flyhalves have been smaller rather than bigger.