When barrows came out, it was much harder. There was little Guthans to use, no summoning familiars, and people had to resort to rune/mystic armor to barrow in. It seems extremely easy now because we can use Guthans, SGS, new prayers, summoning pets, many different spells, and we know exactly what to do at barrows, best methods, quickest routes, etc. I think Barrows is fine as it is, although I'd like it to be more of a challenge.