That much is true, but if it increases local wages and lowers prices, then the government in Stockholm really won't care about it.
Not really. Despite increasingly lowered trade and destruction due to the GNW, Sweden represented ~35% of the maritime in the Baltic Sea from 1721 - 1809, and was still an important trading partner for countries in the region. As evidenced by the Porto Novo Affair, Sweden was still considered a player in the global trading nexus, and even more so in the Baltic.
Local figures, apparently, according to the English and Scottish exchequers.
No it does not. Going to Danzig instead of Riga puts a loss of £25 pounds and going to Arkhangelsk puts a loss of £9 pounds per ship, which is why Riga became so important to Sweden during its empiredom phase otl. If majority of ships going to Riga and Stockholm go to Danzig and Arkangelsk, then the Anglo-Duch stand to be £3,000 to £10,000 in the Red, depending on the year, something that is not feasible by English and Dutch standards. Taking the 1705 Toll records as base, the act would serve to reduce each Ship's profit by £1.2 Pounds, but it still yields English and Dutch traders a profit of £4.9 instead of being in the red.
Such acts would make Sweden catch up, Denmark, Norway, France, Spain, Portugal, Ireland, Scotland, even Brandeburg-Prussia & the Ottomans had passed similar acts before Sweden by 1700. By 1700, pure mercantilism is dead everywhere except Venice. Sven-Erik Åström's Scandinavian Economic Review even laments, in agreement with Economic historians, that at this time, Sweden had fallen behind in maritime shipping administration due to their late reaction to the growing mixed economies cropping up in Europe at the time. Furthermore the acts furthers mercantilism by introducing competition between domestic and international traders, and is a highly valued system of shipping economics in the 18th century as per A History of Economic Theory and Method's 6th Edition.