I don't wanna propose any solution as I'm not experienced enough for that; but I wanna underline the problem lighted by OP: doing scenarios on a just leveled 40 toon is a NIGHTMARE.
I level one character by mixing public quests with scenarios. it means I play scenario every time it pops, and the rest of time I do pve. T1 scenarios are GREAT: there is so much equilibrium between damage and healings, I get killed when I fail position blabla, and I kill or I heal successfully if I play good. T2 lvl 16-18 you suck a bit because of all people 30+, but as asoon as you reach lvl 30 with decent gear everything is smooth again: scenarios, beside unbalancing problems and some people which does not play well, are really enjoyable.
Then I finally hit 40. At that time I'm like 25 renown. Scenarios behaviour completely changes. On a sorc totally specced into damage, not only I'm a truly glass cannon which dies after 2 hits(I expect that) but I cannot do any damage at all. The gap between a high geared lvl 40 and a just levelled 40 is HUUGE. It is so huge that I feel like i'm cannon fodder, have no impact at all, I lose 9/10 scenarios, and I don't get any fun and any reward.
I know that I can farm equip in pve and RR on RvR, but the reality is: RoR scenarios were so fun until 40, then for the next weeks scenarios will not playable at all for me.
I just had an idea: if we don't have enough playerbase to do accurate matchmaking based on RR, we could use bolster to reduce the gap of the MEAN of RR of the two factions. Something like: on a scenario the destro group has mean RR = 50, the order has mean RR = 30. The bolster could improve gear(and/or statistics) until their gear is equivalent to a RR 45 group. The destro would still keep a slightly advantage, and the differences between individual players equip would remain, but the system would be way less imbalanced than now, and way more enjoyable for both winning and losing faction.