your plugin brings some unique features like connection to Google Photos to the table. Before integrating a solution like this in bigger websites I started asking about experiences with your solution.
After speaking to developers around me using your plugin I got reported that there are some problems regarding some 3rd-party software you are using.
One example is Guzzle. To their knowledge, you are not making sure that latest Guzzle is used, for example here: https://nimb.ws/I2jUxc. In most cases, this will stay irrelevant.
The current version of Guzzle is 7.0.1. But sometimes using older version this leads to potential problems with other plugin or solution providers who use Guzzle as their base solution.
So the question is about your policy of updating frequencies of 3rd party software you are using.
This would help me to understand your mindset about this and therefore technical stability in combination with other solutions who use Guzzle in Wordpress.