I'm actually not convinced there are enough good young batsmen out there for us to build a strong Test team: not now and possibly not even in 2-3 years' time. Assume Hughes and Warner come good long-term - seems reasonable despite their current weaknesses, given their obvious talent and work ethic. Clarke and Watson are at least "decent" batsmen, and could be remembered as being very good indeed if we're able to shield them from the new ball with strong openers.
I still have faith in them, this is the first season in a long while where the young/middle aged batsmen haven't put their hand up. This time last year we had
Cosgrove scoring 806 runs at 53.73
Maxwell making his breakout season with 303 runs at 75.75
Lynn 641 runs at 53.41
Joe Burns 281 runs at 70.25
Maddinson who started the season on fire before fizzing out a bit, still managed two hundreds in that time. And then there was Khawaja, Warner and Marsh.
Just for whatever reason none of them have kicked on this season.