IMO ... just fix the Bronzium packs. I understand that if we farm older toons to 7* faster we will have more energy to get gear ... but that will be offset (to some degree) by cutting gear we get from the shard shop in half. This may/may not give us more gear (don't have the time today to do the math or read through the entirety of the forum). For new toons, this will clearly be a net loss in the amount of gear that can be collected.
The worst thing (in CG's viewpoint) that could happen by fixing the Bronzium packs now is that we might actually get a little more gear than we currently get over the long-term ... and that's the big crunch in the game. I, as an older player, am rarely concerned with getting my toons to 7* (sometimes a ship now with GLs but not toons), but gear is the crunch. So, anything the reduces my ability to get gear is a potential negative.
Finally, yes, a number of players are skeptical when CG makes a change that, in the end, we're going to be worse off than before (let's be honest, they don't have a great community track record). If they fixed the Bronzium concern now, without tweaking other areas like drop rates, they'd likely have no one in the community questioning this change.
CG ... just throw out some goodwill and adjust the Bronzium packs now ... the money will still flow into the game ... and you'll make the entire player base happy.