I've seen a couple people say they have no reason to land while exploring, and it could be a waste of time.

On the latest frontier blog they state:

" We also have some additional changes coming for explorers to integrate some of the new features into their progression a little more. The first addition is an exploration rank increase when finding materials for the first time. Subsequent material finds will provide a small increase to the Commander’s explorer rank value. Searching planets by driving in the SRV will also accrue explorer rank increases and the bonus is scaled depending on how far away from Sol you are.

Based on testing and feedback we’re extending the base fuel range for the SRV, and with the materials capacity by preparing in advance you can have plenty of refills for the fuel. In addition the bonus effect from the fuel synthesis is also going to be changed so it improves fuel efficiency rather than boosting the shield. This change might come in a bit late for the 2.0 release, so may come in 2.1. Another change to synthesis is that we’re toning down the damage bonuses before the Horizons release.

For the detailed surface scans we shall increase the payouts for these for the Horizons and 1.5 release."

https://community.elitedangerous.com/node/349