For starters, relics didn’t exist when Malak was released, g13 didn’t even exist.
Second, Malak has artificially inflated stats through his passive, is a tank, and has a one-shot mechanic paired with a bonus turn mechanic. It was somewhat feasible to use him at 5*.
Third, Malak was not considered as a themed unit for Geo TB, where GAS will be. Being unable to use him for geo Tb at the start is disappointing for the amount of new resources needed to unlock.
Fourth, Malak didn’t require relics to unlock. The level of investment needed for GAS is such that it doesn’t make sense to release him at 5*.
Fifth, 5* heroes can’t be used for any PVE content, and with the introduction of relics, they can’t really be used for pvp. For the investment required to unlock, its quite the slap in the face to have a 5* sitting unused in the roster for 6 months.
Finally, GAS, at 5* with 5• mods and G11 will be put in cover almost instantly. He doesn’t have enough protection to be used in GAC or arena or TW for the people who are actually capable of unlocking him.