Regarding Gu Ran's decision, nobody had any objections, as all present were indeed bound by contract with war pets.
Song Wu's present-day blessing as a summoner, now promoted to Red Copper quality, certainly provides a significant boost to summoned beasts. But to be fair, he already commands a substantial number of war pets.
The lord-level Black Water Xuan Snake King, the High-Elite Level Earth-Shaking Bear, the Elite Level Golden Blood Giant Ape—aren't these among the exceedingly strong existences within their respective tiers? As for an ordinary Black Mountain Giant Bear, that's manageable, especially with the Black Bear Mountain Range at hand; there will be opportunities to obtain them in the future.