Answer

A simple question can raise up whether a shielding can might help in further achieving better receiver immunity (i.e. selectivity, blocking) against the possible RF noises or it wouldn't have any significant effect on that. 

The short answer is: likely NO, practically the RX immunity cannot be improved with RF shielding can in any case. Mostly, due to the following RF considerations:

• Such strong interferer that couples in through the PCB traces/components would couple in through the antenna and the RF path anyway so the shield is useless in these cases.
  • Even if it is not an in-band interferer, due to its assumed strong power it would still hurt the RX performance through the antenna (even if there is a filter section between the antenna and the RX input).

• The strong interferer might just couple in through the Motherboad (as well). Actually, a strong enough interferer, that could produce such high levels on the shorter traces of the Radio Boards to disturb the reception is more likely to couple in with large(r) levels through the longer traces of the Motherboard.