I don't know your experience of e-tips but what you describe above is what I experience with the nosler e-tips. Of the 200 odd beasts that have been shot with e-tips these past two seasons, many of these have taken much longer to fall if than I am used to with lead (which are the nosler ballistic tips in the same weight and have been used on equal amounts of beasts over the same duration; a fair comparison). Some beasts' incapacitation are so delayed that they beg another shot despite not unreasonable bullet placings. I am not "informed" but I am assuming that the expansion of these bullets aren't nearly as vigorous as the lead.
I have also found them incredibly hard to get them tuned to within 1 moa through my rifle (which I hear from the gun shops is what they are also hearing from other users), plus their susceptibility to the wind, even at higher velocities, is 2nd rate.
E-tips G1 BC is quoted to be a step better than than the nosler (lead) ballistic tip equivalent, and from direct comparison at the target I truly cant see how this can be due to the excessive drop and windage I am experiencing - not a good mid-long range bullet.
The e-tips are a little more expensive, and the other factor that is starting to merge is the ricochets that are being experienced. I recall from a recent BDS' Deer article that the German's have temporarily suspended a lead-bullet ban this season due to the alarming rate of injuries through ricochets.
From my experience (though others may beg to differ) I wouldn't recommend using them unless you had to for environmental reasons, which is the reason why I continue to use them.
Henry