The longer periods between finding new blocks can be caused by the pool having temporary bad luck. It does not affect your future mining in any way, but it does show the smooth sailing we've had finding new blocks in the past. We are no wizards who can see the future.
- Pool found block faster than average → good luck (>100%).
- Needed more time → tough luck (<100%).
In the long run, the luck is always 100% — smoothing out any rough edges. Therefore, disconnecting after a period of low luck does not make any sense.