Hello and welcome to the forum!
You may call your strategy “simple, idiot-proof” if you want, but I find it probably the wisest first post in this forum that I have seen. I will contrast some previous posters and encourage you to stay with
VT is the most market-neutral investment, packed into one fund with a low TER. You can say it is a slice of the global stocks market. If you don’t want to take any active bets on future development of the market, this is exactly what you should invest into.
VT might be not the most fee and tax efficient way how you invest in the whole market, but I would not bother with optimisation at least until you have few hundred thousand invested. Especially if you can recover US withholding taxes.
You can do like this if you want, but you can also drop Switzerland. Small caps and EM can be also dropped for simplicity. Another thing you can think about is: instead of keeping one portfolio with all funds, make a separate portfolio for each fund (maybe even 2 portfolios for World), and every time contribute to each portfolio according to the current market cap ratios.