Laptop coolers won't be enough
No gaming laptop I've seen so far has been able to combine performance, good cooling and relatively low noise from the cooling solution.
Even with an external cooler it's not going to be much better, all this throttling does is expose how unsuitable the laptop chassis is for the CPU it houses. They can fudge a fix if they want, bottom line is that it'll still throttle and you'll still fail to get the full performance out of it for any sustained period because of the fundamental laws of thermodynamics.