Can we foresee what the consequences would be if it doesn't stay within range? Is it 'just' a matter of adding some sufficiently elusive heavy particle to make

Can we foresee what the consequences would be if it doesn't stay within range? Is it 'just' a matter of adding some sufficiently elusive heavy particle to makes the numbers come out okay without really disturbing anything else, or is there any meaningful sense in which we'd get a fifth force like the BBC article suggests (maybe that we can make nice predictions about)? I imagine it will most likely be nothing, but curiosity about the counterfactual just can't be helped :)