WI Spain and its possessions had been partitioned according to the 2nd treaty and the War of the Spanish Succession had been avoided? This is what things were supposed to go like:
1) The French were to receive Naples and Sicily. They would also get Lorraine, in exchange for which duke Leopold was to receive Milan.
2) The Spanish throne was to go to the Austrian archduke Charles. Spain was to keep its colonies and, from its European possessions, the Southern Netherlands and Sardinia.
3 consequences I can think of:
1) The absence of a war will make the Austrians need the help of Brandenburg-Prussia a lot less, so elector Frederick III will not be recognized as King in Prussia (as Frederick I, which is how he would go down in history in OTL).
2) If the Gonzaga line still dies out, Modena and Montferrat will pass to the duke of Lorraine, who in TTL already controls Milan. In OTL Charles IV, the last Gonzaga duke, allied with France and lost his possessions; at his death Mantua passed to Austria and Montferrat to Savoy, while the duke of Lorraine received Teschen as compensation for not getting the Gonzaga duchies.
3) At this point the emperor's son Leopold Joseph had been conceived but had yet to be born. In OTL the boy died in 1701 and his father 10 years later (of smallpox), which would make Archduke Charles the leader of the House of Habsburg. Butterflies make it very unlikely that he would still rise to that position, but if he dies then the Habsburgs would reunite Spain with Austria and bring back the empire of Charles V.
