If you're still using Google Tasks, I'd switch to Keep asap as it looks like this is probably the direction Google is heading. If you work in the Google ecosystem of apps, Keep is a solid addition to your toolkit.
If your employees are leveraging Dropbox to get work done, you should give them Dropbox. More importantly, you should control Dropbox in the same way the firm manages other technologies - email, calendaring, the phone system, laptops, project management, Word, etc.
Umzuzu is a small, bootstrapped firm in the Kansas City area. Certainly year 11 is much easier than year 1, but we never forget our roots. We understand the desire and value of the DIY projects. They can often save money, especially initially. But as we all know, DIY projects can be surprisingly complex!