Why is there no "mark for upgrade" in Synaptic Package Manager for upgradeable packages?

In Linux Mint 17 Qiana, Synaptic "officially" lacks the upgrade feature. This is for sake of stability - users are supposed to use mintupdate for already-installed packages. Synaptic can still be used to install additional, new packages.

There is sudo apt install --only-upgrade [packagenames] - seems to solve this issue, from the command-line side.

Anyway, it is really sad seeing Synaptic having removed such really relevant features...