SpaceX will probably be listed on the FTSE All World soon. Is it worth waiting to invest?

Hello everyone, I have read that SpaceX may be included in major indices such as the FTSE All World very quickly after the IPO (in some cases even just a few days after the IPO due to new fast-entry rules from the index providers). Now I ask myself: Does it make sense to wait until the end of June to make new investments (e.g. in the FTSE All World ETF) because the inclusion of SpaceX in the index could dilute the index or change it in the short term? Or is that rather irrelevant and Market Ti