According to me
Just a few thoughts, I have been reading recently that lower league players have more drive (play for the shirt) etc. What is failed to be mentioned is the spectacular failure of the past 3 transfer windows at the club. Surely players at larger clubs than us usually are there because they were scouted as and deemed excellent prospects. If anything has been proven by signing players from clubs of the same stature as us (Reading) is that all that has happened is losing existing players and replacing them with no upgrade upon the quality.
Another popular thought is that clubs are now being successful by signing only players from lower leagues. Swansea has been a club used to reference a club that has it's squad developed from lower leagues.
This may be have some truth in it. However, many are overlooking
Brenda Rodgers - very modern, attack-minded coach
Scott Sinclair - Big money signing that made a promotion possible
Fabio Borini - Brenda using good contacts in the game to bring in talent from PL academies
Bournemouth is the prime example of how lower league players can be moulded together to succeed.
Eddie Howe - very modern, attack-minded coach
Conclusion: It is correct to scout lower leagues, the top players in L1 will have the quality to succeed in the Championship as the gap in quality is not large. However, top league 1 players still cost money, Dele Alli of MK Dons cost Spurs £5mil in the last transfer window, the cheaper end of the market will see players replaced like-for-like in my opinion, not an upgrade on the current quality of the squad, solely financial restructuring of the club.
Promoted teams from the Championship either invest heavily or have extremely competent managers.