The current Google Analytics API is moving from Core Reporting V3 to Google Analytics Reporting API V4.
Here is a migration guide : https://developers.google.com/analytics/devguides/reporting/core/v4/migration#introduction
Do you plan to move to the new API ?
What will be the impact for our current datasources ?
Will we have to change them manually ?
I know that the current API will be available for long years, be it's better to use the most updated API.
Here are the main key new features : (Source:https://developers.google.com/analytics/devguides/reporting/core/v4/#features )
These new features will simplify the work on Klipfolio.
The API allows you to request not only built-in metrics but also combination of metrics expressed in mathematical operations. For example, you can use the expression
ga:goal1completions/ga:sessions to request the goal completions per number of sessions.
Multiple date ranges
The API allows you in a single request to get data in two date ranges.
Cohorts and Lifetime value
The API has a rich vocabulary to request Cohort and Lifetime value reports.
The API enables you to get multiple segments in a single request.