So there are several things to address here; I'll do my best to hit all the key points:
1. Genetics - While it is true that family history as a rule is a major predictor of heart disease in life, it is unlikely that family history is related to your skipped beats or wpw. Generally the types of issues that are most concerning in terms of family history are; heart failure/high blood pressure, coronary artery disease and atherosclerosis, cardiomyopathic diseases such as hocm or arvd, degenerative conduction disease, channelopathies such as long qt syndrome. Now, while it is true that skipped beats CAN be a symptom of any of these, all of these diseases present with other scarier symptoms (such as fainting or shortness of breath with exercise) and most of these diseases only show up later in life. The few exceptional cases that occur in the young are usually very profound and obvious.
2. Wpw ablations have a very high curative (success rate) and a low rate of complications. Meaning its very probable that your wpw ablation is holding up still, individual skipped beats are likely a seperate issue. Interestingly enough though, without an ablation skipped beats are what starts up a wpw episode. So a predisposition, or a higher rate of these skipped beats is likely what caused you to discover your wpw in the first place.
3. In terms of heart failure and pvcs/pacs, these issues can in fact cause heart failure if they happen often enough. Fortunately this is a VERY slow process. They can also be a signal for an increased risk of sudden cardiac death if they exhibit a particular distinctive pattern.
In order to absolutely identify whether these patterns are present, and to be able to quantify the frequency of pvcs (determine your risk) you will need to wear another one of those at home holter monitors. This will allow the doctor to determine how many of these skipped beat episodes you experience (specifically we look for what % of the total heartbeats are abnormal), confirm the cause (likely pvcs but always expect the unexpected) and of course what sorts of patterns, if any, are present.
In the overwhelming majority of patients these skipped beats require no treatment, however medicines are often given for patient comfort. Some patterns may require more aggressive medication treatment.. A very small percentage will exhibit either an extremely concerning pattern (such as "runs" of 4 or more pvc beats) or a very high "burden" (over 15% of beats abnormal)... In these rare cases an ablation may be necessary to correct the problem or reduce the burden.
Hope this helps!