So lets say that Hitler orders Sealion launched. What effects on the German military would there be and the rest of the war if Sealion had been launched and failed.
'There'll be Stukas over the vale of Tebourba
Tomorrow when I have my tea
10 minutes later
When they are of no bloody use to me'
OKW was not especially eager to invade and the Kriegsmarine was understandably horrified by the idea. As for 'scooping' the fleets, what was the point of suggesting it? The French fleet is not going to fall into Hitler's hands and the Italian fleet is completely irrelevant, nor can it do anything in the Channel.
The French fleet could not be scooped up. Beyond all of the ships held in British territory, virtually all of the remainder are in North Africa and may turn to the British when Hitler starts scooping, or in southern France and completely unable to get out of the Med and all the way to Germany.
The Stuka, besides being extremely vulnerable to the RAF, was available in numbers between 300-350 for the Battle of Britian so they won't be around for long. In fact, in most actual and serious attempts to gaming the invasion the Stukas are either withdrawn after 2-3 days or all but exterminated within a week. Neither will this small number be held back endlessly in hopes of seeing the Royal Navy when the Luftwaffe has many missions for every plane.
A quarter of the Stukas is a pathetic 70-75 planes, facing the RN, British anti-aircraft artillery in the strongest locations AND the RAF fighters. And if the invasion has to be delayed for several weeks then it is all over. Another month of new equipment and American/Canadian supplies is going to enhance the British Army infinitely more than any benefit the Germans have received.
By October(a month's delay) the British have produced new equipment for another tank division and several infantry divisions. Have the Germans added anything significant to the invasion?
Meanwhile the destruction of a large portion of the invasion fleet means German industry is crippled for several months, as it was those barges and tugs which supply most of German industry with coal, iron and other vital materials. Until they are replaced there can be no expansion of production or even maintaining of existing production levels. Not to mention the iron and coal needed to produce the replacement craft. Where replacements for the trained and experienced crews will come from is another question.
The statistics given for RN versus KM battle losses are also meaningless. The only relevant stats would be German light forces competing gainst their British counterparts. Given the vastly superior numbers available to the Brits in September 1940, there is little reason to be hopeful. And beyond this wild assumption of the Luftwaffe being able to achieve far more against the RN than in OTL, not for lack of trying, two or three weeks of BRITISH bombing means the German invasion fleet has not only lost all reserve ships but can not even launch the planned first waves of roughly one brigade from each of the nine divisions in the first wave. In effect, the invasion is collapsing before the first wave can even set sail.
The mine fields are not remotely comparable to US operations against Japan's merchant marine and appear dense because they involve a very small area dependent on Otto Ruge with 30 minelaying craft, which were also tasked to help with supplying the invasion. Ruge himself was quite clear that the mine fields had not the slightest hope of stopping the RN. As to why RN warships, with so many minesweepers on the spot, would suffer losses remotely as severe as the Japanese merchant marine against a much larger and more extended operation when the Japanese air force was no longer viable...not to mention comparing careful operations to clear mines wholesale after the war with clearing a few small lanes in time of war. Also RN warships and armed auxiliaries INSIDE the proposed minefields might may have something to say about Germany's small number of minelayers
The forces that were unleshed in July/Aug were only about 70-80 Stuka,so they will do considerable damage and suffered only a few dozen lost .