Regarding the Relic Upgrade quest, I think many players who are complaining about RNG need to look into the mirror and consider which one of these 2 groups you fit into. Either:

a) You want the upgraded Relic for something other than Coil, most likely for vanity or to show that you have it.

b) You need it for Coil progression.

If you fall into group a), then there really is no rush to have it. You don't need this level weapon for anything other than Coil (and may not even need it then)

If you fall into group b) you are complaining about RNG when trying to obtain a weapon that will allow you to progress onto content that also relies heavily on RNG. Yeah...

So, which are you?