Those sound like good ideas.
In general, for a protocol of the standing of Morpho, you need several liquidity sources, and ideally presence on several chains.
Due to its market dominance, it is quite impossible to avoid Uniswap, at least a v3 pool, probably using Merkl for reward distributions.
Besides that I would also advise having other sources of liquidity, to generate volume from arbitrage, and benefit from cheaper liquidity. Indeed, in the current state of the market, v2 or v3 pool on Pancakeswap (even on mainnet), or a crypto pool on Curve (could imagine a triMORPHO pool with MORPHO, ETH and USDC/T), both those platforms see between 2x and 3x vote incentive efficiency. That means that 1$ of incentives spent in vote incentives leads to 2-3$ of CAKE/CRV incentives going to the pool, so the same amount of rewards could bring 2/3x more liquidity than on Uniswap for example. I think this is something we cannot overlook.
There is also the new Cowswap pools deployed on Balancer with value extraction protection, which might be interesting. Would need to check out how they perform.
Finally, as to how rewards are allocated, I believe (as I said before in this post) that the most efficient way to allocate them is probably through votes using the veTKN gauge mechanism.