New gear recommendations

A lot of people have been talking about better gear. I think the better gear should be earned, not just bought.
Instead of bringing out a new level of gear or a new color, it should be possible to upgrade your gear, like it is possible to upgrade your heroes.
Say, for example, you have a level 70 purple gear with the stats of 88, 70, 59.
If you used 5 gold crystals and 15 purple crystals, you could upgrade to gold armor: now with the stats "new number", 88, 70
or
If you used 7 gold crystals and 21 purple crystals, you could upgrade to gold armor, with the new stats, and keep half of your enhancement levels.
Gold crystals should be used for more than just upgrading a single hero.
Instead of bringing out a new level of gear or a new color, it should be possible to upgrade your gear, like it is possible to upgrade your heroes.
Say, for example, you have a level 70 purple gear with the stats of 88, 70, 59.
If you used 5 gold crystals and 15 purple crystals, you could upgrade to gold armor: now with the stats "new number", 88, 70
or
If you used 7 gold crystals and 21 purple crystals, you could upgrade to gold armor, with the new stats, and keep half of your enhancement levels.
Gold crystals should be used for more than just upgrading a single hero.