The iPhone 7 Plus inherits a 7 out of 10 on our repairability scale (10 is the easiest to repair):

The battery is straightforward to access. Removing it requires specialty screwdrivers and knowledge of the adhesive removal technique, but is not difficult.

The solid state home button eliminates a common point of failure.

Improved water and dust protection greatly reduces the need for repairs associated with environmental damage and accidental spills (but also makes some repairs more difficult).

The display assembly continues to be the first component out, simplifying screen repairs, but the procedure has grown more complicated with improved waterproofing measures.

With the addition of tri-point screws, many iPhone 7 Plus repairs will require up to four different types of drivers.