A meer lined bowl would be good to ad to the collection. If you like it then I'm sure adding a full meer in the future wouldn't be a problem either. Meer is very durable and would have no issue being smoked constantly but as another member said, it might be the briar shank which will get a bit soggy after relentless use. This also can affect the ghost repelling qualities that the meerschaum material provides, as the shank might get flavours sticking around while the bowl won't. So if you really want the meer for the pure flavour and less chance of ghosting, then maybe a meer lined isn't the best option.
I think as with most any pipe, overuse isn't really a danger to the pipe, but to the tastebuds...eventually the pipe gets saturated with moisture and subsequent smokes with be less pleasurable. This can be mitigated with dry tobacco and pipe cleaners though, and overnight rest in a dry warm environment can make some pipes smokable with more frequency. Meer is so porous it can take up lots of moisture from repeated smokes. A lined bowl vs full meer will give you less moisture soaking ability, but more so than a full briar. My meer lined pipe doesn't smoke as cool as my full meer, but it does give a dry smoke.
I think as with most any pipe, overuse isn't really a danger to the pipe, but to the tastebuds...eventually the pipe gets saturated with moisture and subsequent smokes with be less pleasurable. This can be mitigated with dry tobacco and pipe cleaners though, and overnight rest in a dry warm environment can make some pipes smokable with more frequency. Meer is so porous it can take up lots of moisture from repeated smokes. A lined bowl vs full meer will give you less moisture soaking ability, but more so than a full briar. My meer lined pipe doesn't smoke as cool as my full meer, but it does give a dry smoke.