#2 It keeps the Shield intact
It might not seem like a big deal right now but the Shield is arguably the biggest stable in recent times and losing Dean Ambrose would have pretty much meant the end of the group.
If crowd reactions are anything to go by, then this week's Monday Night Raw clearly showed how popular and pivotal the Shield is to WWE and how big a reception the bunch gets whenever the band gets back together.
A former WWE writer just went after JBL for his comments HERE
Many a time WWE has even blatantly used the stable to just force some life into Monday Night Raw and PPVs (for instance Braun Strowman's Money in the Bank cash-in last year). Losing something like that would have been a huge loss as WWE would have been losing the services of one of its homegrown talents.