Yammer is useless, but I found Lync to be very reliable. Why use Hangouts if your company is using Slack for team channels, and it has group video chat? Of course Lync is now "Skype for Business" and I don't think its as good as Lync was tbh. I think Microsoft should buy Slack and toss it into its Office 365 offering, if you want my honest opinion.
The web version of Word and Excel are vastly superior to Google's docs and sheets, I don't know how you can argue otherwise. Though, I don't know why you'd use them when you get the full versions for free in your 365 (which totally demolish Google's offerings.) Docs hasn't really done anything since it first launched, while sheets does have decent integrations...but it's no Excel.
Now 365 has baked in project management, Delve, business insights etc. There is no comparison.
The web version of Word and Excel are vastly superior to Google's docs and sheets, I don't know how you can argue otherwise. Though, I don't know why you'd use them when you get the full versions for free in your 365 (which totally demolish Google's offerings.) Docs hasn't really done anything since it first launched, while sheets does have decent integrations...but it's no Excel.
Now 365 has baked in project management, Delve, business insights etc. There is no comparison.