Some tanks allready have track add on armor in game and i am suggesting it for more vehicles.
Historically many crews added tracks and other spare parts on the front of the vehicle to get more protection, how much it helped in reality is debatable, if at least it gave a moral boost.
In game it would offer some limited protection (these can be shot off) at the cost of a bit more weight and can save you from a shot or 2 especially badly aimed ones. Furthermore such tracks give the vehicle a more used, fight approved and unique look. Here are some possible looks, tho in game they arent all fixed to historic placements and more can be applied to furhter increase the effect over different survaces.
On the Halftracks such as the Sd.Kfz.251s it would offer a bit more protection against HMGs and generally increase the survivability a bit more.
These could be added to the Lower and Higher front as well as side.
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Panzer Wrecks (Publication)Tank Archives: Spare Track Links