How do newer players build their skills if any content before hw is considered Old

[bswpayton]

It's kind of lame to say this but the 50 content stuff
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I have ran this with my fc members but most people wana do it unsyc, thus curving the challenge sense they are level 60, and I main a whm so it doesn't change to much and with potd you can use your skills. So for bard while it changes alot with wanders minuet you still have pretty much the say core abilities with a cast time. I just would like to be just as good at the level 50 stuff as the level 60 content doing a search today its more dungeons from 50 quest line than in hw. Also doing every job you will do these dungeons over and over and the trials. I just dont get the whole content is old thing its still in the game and if your either gona be running the same dungeons at level 60 over and over again or at level 50 over and over again its still all relevant content.