I think this laptop has pretty specific target audience. The review unit has 16GB RAM, pre-installed Windows 10 Pro and 512GB SSD, resulting in 800 Euro. This is already in the cheappo territroy, and if you go let go all of these (i.e. Windows, additional RAM on SODIMM slot, bigger SSD) and upgrade it with something you already own, it could go down to 500-ish Euro, effectively entering the super cheappo territory.
Usually, cheappo laptops don't carry Thunderbolt, and super cheappo almost never carries Thunderbolt, because target audiences probably don't have multiple 4K monitors and thunderbolt docks. In other words, this is one of the cheapest laptop with Thunderbolt. Obviously, someone who use this laptop almost exclusively with Thunderbolt dock probably don't care much about screen quality or battery life. In this use case, low price tag at the expanse of poor screen and battery is more than welcome.
Also, good battery life is not neccessarily a good thing, especially for certain audience (someone who almost never use it on battery, or only for short duration). There are roughly three ways of getting good battery life, and every manufacturers use a combination of them.
Bigger battery is a straight up solution which gives you longer battery life without performance drop, but it is almost certainly heavier and leaves less room for other interanl parts. It is also somewhat more expensive.
Using low power parts (not just CPU, but also display, RAM, SSD, WiFi module, etc) gives you longer battery life without the weight penalty, but this approach introduces a steeper price tag and there might be some performance drop.
The other common method is aggressive power management scheme, both on software and hardware level. This provides a longer battery life without getting any heavier or costlier, but comes with moderate to severe performance drop (in some cases, not configurable by user).
45Wh battery capacity is low end of the spectrum, but the battery life is much worse than similarly spec'ed laptops. This and relatively higher performance suggests that it has relatively performance-focused power management scheme. This is a good thing for someone who doesn't use it on battery often. Someone who needs more juice could go 60Wh at the expense of expandable 2.5" cage.
The other thing I notice is relatively good port configurations with some reinforcement, which is rare thing at this price point.
However, according to Lenovo, it's HDMI 1.4b, not 2.0. This is no problem for someone who use this laptop with TB dock or TB monitor. But for someone who regularly use a regular 4K external monitor via HDMI without TB dock, it could be a hassle.
psref.lenovo.com/Detail/ThinkBook/ThinkBook_14_G2_ITL?M=20VD008WGE